JP6588231B2 - Partial denture - Google Patents

Description

  The present invention relates to a partial denture, a partial denture manufacturing kit, a shaft body, and a shaft body manufacturing mold. That is, the present invention relates to a partial denture, a partial denture manufacturing kit, a member used for the partial denture, and the like.

  Dentures are roughly classified into complete dentures (total dentures) and partial dentures (partial dentures).

Conventionally, as a partial denture, there is known a partial denture in which an auxiliary denture base is mounted so as to be swingable with respect to a basic tooth base.
For example, Patent Document 1 describes a partial denture in which a holding member constituting an artificial gingiva is attached to an artificial tooth so as to be swingable by a hinge, and the holding member is pressed against the remaining tooth to prevent dropping. The swing axis of the hinge in Patent Document 1 is perpendicular to the occlusal surface of the teeth, and a pair of holding members are provided on both front and back sides of the remaining teeth. The swing axis of the hinge in Patent Document 2 is the dentition direction, and the cheek side (outside) artificial gingiva swings. In the partial dentures of Patent Document 1 and Patent Document 2, magnets that are attracted to each other in a state in which the holding member is pressed against the remaining teeth are provided on the holding member and the artificial gingiva, respectively.

No. 7-49934 JP 2004-254911 A

  However, in the partial dentures of Patent Document 1 and Patent Document 2, since the auxiliary denture base is fixedly attached to the basic tooth base, it is not easy to clean the hinge portion that is the swing shaft. When eating candy accumulates at the hinge part, not only bacteria propagate, but the swinging movement of the hinge is impaired and the holding member does not fully open and close, causing magnet adsorption failure and the partial denture from the alveolar ridge The problem that it becomes easy to drop off arises. Therefore, it has been desired to provide a partial denture that is excellent in the cleanability of the hinge portion.

  This invention is made | formed in view of the above subjects, and provides the partial base denture excellent in the cleaning property, the partial base denture manufacturing kit, the shaft main body, and the model body for shaft main body manufacture.

  The partial denture according to the present invention includes a first denture base that is detachably attached to the alveolar ridge and a second denture base that is detachably attached to the first denture base. A denture, wherein the first denture base or the second denture base includes a first holding portion provided at a location different from the bearing portion and the bearing portion, and the bearing portion and the first holding portion. The first denture base or the second denture base not having a shaft main body having a shaft portion that is removably attached to the bearing portion and is pivotally supported, and a second holding portion corresponding to the first holding portion. The bearing portion has an entrance / exit opening for the shaft portion to enter / exit, and the shaft portion is inserted into the bearing portion via the entrance / exit opening and pivotally supported. The second denture base is mounted so as to be swingable with respect to the first denture base, One by the a first holding portion and the second holding portion are held together, characterized in that the swinging of the second denture for the first denture is restricted.

  The partial denture manufacturing kit of the present invention is a partial denture manufacturing kit for manufacturing the partial denture of the present invention, and extends from the shaft portion and the shaft portion in a direction different from the axial direction of the shaft portion. A shaft body provided with a supporting portion or a shape corresponding to the shaft body, and a shaft body manufacturing mold for manufacturing the shaft body, and the shaft portion can be pivotally supported and the shaft portion It is characterized by comprising a bearing part provided with an entrance / exit opening for entering / exiting or a shape corresponding to the bearing part and a bearing part manufacturing mold for producing the bearing part.

  The shaft main body of the present invention is a shaft main body used for the partial denture of the present invention, and has a shaft portion and a support portion extending from the shaft portion in a direction different from the axial direction of the shaft portion. The support portion has a sandwiching portion that protrudes from an end region near the shaft portion and extends substantially parallel to the axial direction of the shaft portion, and a pitch between the sandwiching portion and the shaft portion is determined by the sandwiching portion. The outer diameter is equal to or smaller than the outer diameter.

  The shaft body manufacturing mold of the present invention is a shaft body manufacturing mold for manufacturing the shaft body used in the partial denture of the present invention, and has a shape corresponding to the shaft body. To do. The shaft body includes a shaft portion and a support portion extending from the shaft portion in a direction different from the axial direction of the shaft portion, and the support portion protrudes from an end region near the shaft portion. A pinching portion extending substantially parallel to the axial direction of the shaft portion is provided, and a pitch between the pinching portion and the shaft portion is equal to or less than an outer diameter of the pinching portion.

  The partial denture base of the present invention has a shaft structure in which the second denture base is mounted on the first denture base and the bearing portion and the shaft main body are detachable, and the bearing portion and the shaft main body are separated from each other. Each can be cleaned in the wet state. Therefore, the partial denture base of the present invention is excellent in cleanability.

  Moreover, the partial denture manufacturing kit of this invention can package and provide the member for manufacturing the partial denture base of this invention easily, and is convenient.

  Further, the shaft main body of the present invention forms a part of a detachable shaft structure with stable swinging motion with respect to a pair of bearings.

  The shaft body manufacturing mold of the present invention is suitable for manufacturing a shaft body that is stable in swinging motion with respect to a pair of bearings.

(A) is a perspective view which shows the state before mounting the partial denture of 1st embodiment of this invention to a jaw model, (b) is a jaw for the partial denture of 1st embodiment of this invention. It is a perspective view which shows the state with which the model was mounted | worn. It is a perspective view of the state where the 1st denture base and the 2nd denture base of 1st embodiment isolate | separated. These are the perspective views of the state in which the 2nd denture base is mounted | worn with the 1st denture base of 1st embodiment, and the 1st holding | maintenance part and the 2nd holding | maintenance part are not hold | maintained mutually. It is a perspective view in the state where the 2nd denture base was equipped with the 1st denture base of a first embodiment, and the 1st maintenance part and the 2nd maintenance part were mutually held. It is a perspective view of the axis body and bearing part in a first embodiment. (A) is a top view of the bearing part in 1st embodiment, (b) is a left view of the bearing part in 1st embodiment, (c) is a bearing part in 1st embodiment. It is a back view. (A) is a perspective view of an anchor that is a second holding portion in the first embodiment, (b) is a top view of a pair of wires that are the first holding portion in the first embodiment, and (c) ) Is a front view of the auxiliary tool. It is explanatory drawing explaining the operation | movement which mounts a shaft main body with respect to a bearing part in steps, (a) shows the state before inserting the shaft part of a shaft main body in the entrance / exit direction with respect to a bearing part, (b) The state where the shaft portion is inserted into the bearing portion is shown, (c) shows the state where the shaft portion inserted into the bearing portion is rotated, and (d) shows the state where the shaft portion supported by the bearing portion is swung. The shaft body is shown in the correct position with respect to the bearing. It is a perspective view of the partial denture of 2nd embodiment of this invention. It is a perspective view of the partial denture of 3rd embodiment of this invention. (A) is a perspective view of the sheath part in 3rd embodiment, (b) is bb sectional drawing of the sheath part in (a). It is a top view of the metal plate for comprising the bearing part of 4th embodiment of this invention. (A) is a top view of the bearing part of 4th embodiment, (b) is a left view of a bearing part, (c) is a front view of a bearing part. It is a top view of the metal plate of the bearing part which is a modification of 4th embodiment of this invention. (A) is a top view of the bearing part of the modification of 4th embodiment, (b) is a left view of the bearing part of a modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same constituent elements are denoted by the same reference numerals, and redundant description is omitted as appropriate.

<First embodiment>
FIG. 1A is a perspective view showing a state before the partial denture 100 of the first embodiment of the present invention is mounted on the jaw model 700. FIG. In FIG. 1A, the first holding part 50 and the second holding part 60 (not shown) are in a non-holding state, and the second denture base 20 can swing in the direction of the double-ended arrow in the figure. FIG. 1B is a perspective view showing a state in which the partial denture 100 according to the first embodiment of the present invention is mounted on the jaw model 700.
FIG. 2 is a perspective view showing a state where the first denture base 10 and the second denture base 20 of the first embodiment are separated.
FIG. 3 shows a state in which the second denture base 20 is mounted on the first denture base 10 of the first embodiment and the first holding part 50 and the second holding part 60 are not held together (hereinafter referred to as the first state). It is also a perspective view.
FIG. 4 shows a state in which the second denture base 20 is mounted on the first denture base 10 of the first embodiment and the first holding part 50 and the second holding part 60 are held together (hereinafter also referred to as the second state). It is a perspective view. In FIG. 4, a pair of wires 130 in the first holding unit 50 and an anchor 170 in the second holding unit 60 are selectively seen through.
FIG. 5 is a perspective view of the shaft body 40 and the bearing portion 30 in the first embodiment.
Fig.6 (a) is a top view of the bearing part 30 in 1st embodiment, FIG.6 (b) is a left view of the bearing part 30 in 1st embodiment. FIG.6 (c) is a reverse view of the bearing part 30 in 1st embodiment. In addition, the bearing part 30 demonstrates the observation from the arrow direction shown in Fig.6 (a) to FIG.6 (c) as a front view.
Fig.7 (a) is a perspective view of the anchor 170 which is the 2nd holding | maintenance part 60 in 1st embodiment. FIG.7 (b) is a top view of a pair of wire 130 which is the 1st holding | maintenance part 50 in 1st embodiment. FIG. 7C is a front view of the auxiliary tool 174.
FIG. 8 is an explanatory view illustrating the operation of mounting the shaft main body 40 on the bearing portion 30 step by step.

First, the outline | summary of the partial denture 100 of this embodiment is demonstrated.
As shown in FIG. 1, the partial denture 100 according to the present embodiment is used by being detachably attached to the first denture base 10 and detachably attached to the alveolar ridge 701. Second denture base 20 to be provided.
As shown in FIGS. 2 to 4, the first denture base 10 or the second denture base 20 has a bearing portion 30 and a first holding portion 50 provided at a location different from the bearing portion 30. The first denture base 10 or the second denture base 20 that does not have the bearing portion 30 and the first holding portion 50 is attached to the bearing portion 30 in a detachable manner and has a shaft body 40 having a shaft portion 42 that is pivotally supported. The second holding part 60 corresponding to the one holding part 50 is provided. The bearing portion 30 has an entrance / exit opening 31 (see FIGS. 2 and 4) through which the shaft portion 42 enters and exits. The shaft portion 42 is inserted into the bearing portion 30 via the entrance / exit opening 31 to Be supported. Thereby, the second denture base 20 is attached to the first denture base 10 so as to be swingable. In the partial denture 100, the first holding part 50 and the second holding part 60 are held together, whereby the swing of the second denture base 20 with respect to the first denture base 10 is restricted (see FIG. 4).

Here, the inside of the bearing portion 30 refers to a side that can face the shaft portion 42 inserted from the entrance / exit opening 31 in the bearing portion 30. In addition, the term “outside” may be used as a pair of terms on the inside as appropriate.
Further, the swing of the second denture base 20 with respect to the first denture base 10 is a second denture that is generated when the shaft portion 42 becomes a swing shaft and the shaft rotates while the shaft portion 42 is pivotally supported by the bearing portion 30. This means the operation of the floor 20. Here, for convenience, the second denture base 20 swings with respect to the first denture base 10, but includes that the first denture base 10 swings with respect to the second denture base 20.
When describing the bearing portion 30, the surface on the side facing the artificial gingival portion 704 is sometimes referred to as a back surface, and the surface facing the back surface may be referred to as an upper surface as appropriate. In the second state, the side including the portion where the shaft body 40 extends from the bearing portion 30 may be referred to as the front surface of the bearing portion 30.

Since the second denture base 20 is detachable from the first denture base 10, the partial denture 100 can be cleaned with the shaft portion 42 and the bearing portion 30 being separated from each other. Since the shaft part 42 and the bearing part 30 are mounted so as to be able to swing with each other, they have a structure in which a gap can be formed, and food traps and the like are easily clogged in the oral cavity, but they should be separated from each other and cleaned. Can maintain good hygiene.
Further, in the partial denture 100, the swing of the second denture base 20 is restricted by the first holding portion 50 and the second holding portion 60 being held together, and the shaft portion 42 is detached from the bearing portion 30. Therefore, it is difficult for the second denture base 20 to separate from the first denture base 10.
That is, in the partial denture 100, the second denture base 20 can be attached to and detached from the first denture base 10, and the second denture base 20 is easily prevented from detaching from the first denture base 10 in the oral cavity. Yes.
The shaft structure having the bearing portion 30 and the shaft main body 40 according to the present invention is different from the shaft structure having a fixed engagement relationship between the shaft and the bearing like a hinge used in a conventional denture base. This is a novel shaft structure that can be repeatedly attached to and detached from the main body 40.

  Next, the partial denture 100 of this embodiment will be described in detail. In the following description, the partial denture 100 in which the bearing unit 30 and the first holding unit 50 are provided on the first denture base 10 and the shaft body 40 and the second holding unit 60 are provided on the second denture base 20 is appropriately described. A specific example will be described.

  In the partial denture 100 according to the present embodiment, the second denture base 20 is attached to the first denture base 10, and the partial denture 100 is engaged with a predetermined residual tooth 702 or gum 703 of the user. The partial denture to be used.

As shown in FIG. 2, the partial denture 100 can be detached from the first denture base 10 and the second denture base 20. By cleaning in this state, the details of the bearing portion 30 and the shaft body 40 can be sufficiently cleaned.
A first state can be obtained by mounting the shaft body 40 on the bearing portion 30 (see FIG. 3). At this time, the second denture base 20 is in a state capable of swinging with respect to the first denture base 10. For example, the partial denture 100 previously made into the first state can be put in the oral cavity.
The partial denture 100 in the first state can be brought into the second state by holding the first holding part 50 and the second holding part 60 together (see FIG. 4). In the second state, the swing of the second denture base 20 with respect to the first denture base 10 is restricted. For example, after the partial denture 100 in the first state is installed at a predetermined position in the oral cavity, the second denture base 20 is swung toward the first denture base 10 side, and the first holding portion 50 and the second holding portion. 60 can be held together. Thereby, the partial denture 100 can be easily installed at an appropriate position in the oral cavity.

  Although FIG. 1 illustrates a lower jaw model 700, the partial denture 100 of this embodiment can be used for both the upper jaw and the lower jaw. In this embodiment, an example in which the artificial tooth 708 is erected only on the first denture base 10 is shown, but the artificial tooth 708 may be erected on the second denture base 20.

The first denture base 10 and the second denture base 20 in the present embodiment each have an artificial gingival part 704. The artificial gingiva part 704 is formed to imitate a human gum 703. The member which comprises the artificial gingiva part 704 is not specifically limited in the range which does not deviate from the meaning of this invention. For example, the artificial gingival portion 704 may be any one or combination of a metal floor made of metal, a resin floor made of resin (resin), or a composite floor in which a resin is coated on the surface of the metal floor.
Although the member which comprises the artificial tooth 708 is not specifically limited, For example, it can create with a hard resin material.

  In this specification, the gum 703 includes a gum that covers the root (not shown) of the remaining tooth 702 and a gum that does not cover the root of the remaining tooth 702. The gum 703 in the region where the remaining teeth 702 are missing has a bank-like portion that rises between the buccal side or lip side and the lingual side. In the present specification, the bank-like portion is referred to as an alveolar ridge 701.

As shown in FIGS. 2 to 4, the artificial gingival portion 704 has a buccal gingival portion 706 and / or a remaining tooth 702 (see FIG. 1) located on the buccal side of the remaining tooth 702 (see FIG. 1) in the oral cavity. It has the lingual gingival part 707 located on the lingual side. In addition, the present invention includes a partial denture in the field, and in the following description, when referring to “buccal side” as appropriate, “lip side” is also included, and the artificial gingival part 704 located on the lip side is also included in the buccal side gingival part. 706 can be read.
In the present embodiment, only the first denture base 10 is provided with a lingual gingival portion 707 extending to the lingual side of the remaining tooth 702. The artificial gingiva part 704 of the second denture base 20 in the present embodiment is a buccal gingival part 706 as a whole.

  In the present embodiment, both the first denture base 10 and the second denture base 20 are provided with a buccal gingival portion 706 located on the buccal side of the remaining teeth 702 in the oral cavity. All of the bearing part 30, the shaft main body 40, the first holding part 50, and the second holding part 60 in the present embodiment are provided in the buccal gingival part 706. Thereby, even if it is a case where the holding state of the 1st holding | maintenance part 50 and the 2nd holding | maintenance part 60 is canceled in some time in the oral cavity, a 2nd denture base is put on a cheek (illustration omitted) and a gum 703. Since 20 is pressed, the swing range of the second denture base 20 is limited. Therefore, it is difficult for the shaft body 40 to be detached from the bearing portion 30.

  More specifically, the bearing part 30 and the first holding part 50 are provided on the buccal gingival part 706 of the first denture base 10 and facing the second denture base 20. The second holding part 60 is provided on the buccal gingival part 706 of the second denture base 20 and facing the first denture base 10. The shaft body 40 is provided at one end in the longitudinal direction of the artificial gingival portion 704 of the second denture base 20.

The partial denture 100 has a first axial direction 110 that is the axial direction of the shaft portion 42 that enters and exits the bearing portion 30 through the access opening 31 and the second denture base 20 with respect to the first denture base 10. Is different from the second axial direction 114, which is the axial direction of the shaft portion 42 that is pivotally supported by the bearing portion 30 so as to be swingable.
Even if the holding of the first holding part 50 and the second holding part 60 is eliminated in the oral cavity due to the difference between the first axial direction 110 and the second axial direction 114, the second denture base 20 However, it is prevented from easily leaving the first denture base 10.
Details of the movement of the shaft portion 42 from the first axial direction 110 to the second axial direction 114 will be described later.

The first denture base 10 in the present embodiment includes an artificial gingival portion 704, an artificial tooth 708 installed at a predetermined location of the artificial gingival portion 704, the bearing portion 30, and the first holding portion 50.
The first denture base 10 is larger than the second denture base 20 and is disposed in the oral cavity across the alveolar ridge 701.

The bearing part 30 in this embodiment is provided in the first denture base 10 so that the entrance / exit opening 31 is exposed on the surface of the artificial gingival part 704. For example, as shown in FIG. 2, the bearing portion 30 is installed in a concave portion 704 b that is deeper than the main surface 704 a of the artificial gingival portion 704 in the first denture base 10. This prevents the bearing portion 30 from coming into contact with the inside of the oral cavity (for example, the cheek). In addition, the main surface 704a means the main surface of the artificial gingiva part 704 provided continuously corresponding to the oral cavity.
From this viewpoint, it is particularly preferable that the highest position of the bearing portion 30 installed in the recess 704b is equal to or less than the height of the main surface 704a in the vicinity of the recess 704b. In addition, the height here is a height when the installation surface of the bearing portion 30 with respect to the artificial gingival portion 704 is viewed downward.

  As shown in FIG. 5, the bearing portion 30 has an access opening 31 for the shaft portion 42 to enter and exit. The bearing portion 30 pivotally supports the shaft portion 42 inserted inside through the entrance / exit opening 31 so as to be rotatable. When the shaft portion 42 pivotally supported by the bearing portion 30 rotates, the second denture base 20 including the shaft portion 42 swings with respect to the first denture base 10.

  The entrance / exit opening 31 in the present embodiment is configured to restrict the axial direction of the entering / exiting shaft portion 42 to the first axial direction 110. The entrance / exit opening 31 is an opening provided in the side peripheral portion 80, and the opening width observed from the front can be equal to or larger than the minor axis dimension of the shaft portion 42 and smaller than the major axis dimension.

  The bearing portion 30 in the present embodiment has a space 116 that allows rotation to change the axial direction of the shaft portion 42 inserted inside (see FIG. 5). When the shaft portion 42 inserted inside the entrance / exit 31 is rotated in the space 116, the axial direction of the shaft portion 42 changes between the first axial direction 110 and the second axial direction 114.

  According to the aspect in which the axial direction of the shaft portion 42 is different between the first axial direction 110 and the second axial direction 114, the shaft portion 42 whose axial direction has changed to the second axial direction 114 can be easily passed through the access opening 31. Therefore, it does not fall off from the bearing portion 30. That is, in order to change the axial direction of the shaft portion 42 that is pivotally supported by the bearing portion 30, it is necessary to change the direction of the entire second denture base 20 including the shaft portion 42. However, an unintended change in the orientation of the entire second denture base 20 is unlikely to occur by chance in a limited space in the oral cavity. Therefore, according to the present embodiment, the shaft portion 42 is not easily detached from the bearing portion 30 in the oral cavity.

The space 116 is defined by an inner peripheral surface 32 (see FIG. 5) of the bearing portion 30 and communicates with the outside of the bearing portion 30 through the entrance / exit opening 31.
The bearing portion 30 may have an opening other than the entrance / exit opening 31 as appropriate. For example, as shown in FIG. 5, the bearing portion 30 has a first opening 126 on the left side and a second opening 128 on the right side. By providing the first opening 126 or the second opening 128, the inside of the bearing portion 30 can be more sufficiently cleaned.

  The space 116 communicates with the outside through the access opening 31, the first opening 126, and the second opening 128. In the present embodiment, the normal direction of the opening surface of the first opening 126 or the opening surface of the second opening 128 is different from the first axial direction 110. Specifically, as understood from FIGS. 5 and 6, for example, the normal direction of the opening surface of the first opening 126 or the second opening 128 in the present embodiment is substantially orthogonal to the first axial direction 110. When the shaft portion 42 inserted inside the bearing portion 30 from the first axial direction 110 through the entrance / exit opening 31 is rotated in the space 116 to change the axial direction, the end portion of the shaft portion 42 is temporarily moved. The first opening 126 or the second opening 128 may be exposed to the outside of the bearing portion 30. Accordingly, the shaft portion 42 can smoothly rotate in the limited space 116, and the axial direction can be changed from the first axial direction 110 to the second axial direction 114. For example, the first opening 126 and the second opening 128 may be opposed to each other, and the distance between the opening surface of the first opening 126 and the opening surface of the second opening 128 may be equal to or less than the major axis dimension of the shaft portion 42.

  The rotation of the shaft portion 42 includes both a rotation operation performed regardless of the rotation direction and a rotation operation rotating in any one direction unless otherwise specified.

  The bearing portion 30 has a side peripheral portion 80 that supports the shaft portion 42 so as to be rotatable. The inner periphery of the side peripheral portion 80 is curved so that the shaft portion 42 supported by the bearing portion 30 can rotate smoothly. In the present embodiment, the side peripheral portion 80 may be provided across the entrance / exit opening 31. In other words, an opening is formed in a part of the side peripheral portion 80 that supports the shaft portion 42 so that the shaft is rotatable, thereby forming the access opening 31. When the distance of the depth of the space 116 communicating with the outside through the access opening 31 is equal to or larger than the major axis dimension of the shaft portion 42, the entire shaft portion 42 can be included inside through the access opening 31. The entrance / exit opening 31 in the present embodiment is an opening continuous from the front surface to the upper surface of the bearing portion 30 (see FIG. 5). In the space 116, the depth dimension in the entrance / exit direction 112 from the entrance / exit opening 31 that opens to the front side is equal to or greater than the major axis dimension of the shaft portion 42. The entire shaft portion 42 inserted into the bearing portion 30 is enclosed in the space 116, and the support portion 90 projects from the upper surface of the bearing portion 30 through the access opening 31.

As described above, the first denture base 10 or the second denture base 20 has the artificial gingiva portion 704. The bearing part 30 in this embodiment has the undercut part 122 on the back surface, as shown in FIG.6 (b) and FIG.6 (c). The undercut portion 122 is buried (not shown) on the surface side of the artificial gingival portion 704 (in this embodiment, the artificial gingival portion 704 of the first denture base 10), whereby the bearing portion 30 is installed on the artificial gingival portion 704. Stabilize the state.
In the present embodiment, the back surface of the bearing portion 30 is a surface facing the artificial gingival portion 704 of the base end portion 120 provided in the bearing portion 30. The proximal end portion 120 is a portion that faces the upper surface of the bearing portion 30 and is a portion that is in contact with or embedded in the artificial gingival portion 704.

The undercut portion 122 is a portion protruding from the back surface of the bearing portion 30. For example, as shown in FIGS. 6B and 6C, the undercut portion 122 extends in one direction on the back surface of the bearing portion 30 and extends in the other direction intersecting with the protruding portion. It consists of a combination with a protruding part. Although not shown in the drawings, the protruding portion constituting the undercut portion 122 may be one or a plurality of columnar bodies, or a line-shaped body constituting an arbitrary shape.
In the present embodiment, the side surface 124 of the undercut portion 122 is inclined in a divergent manner in a direction protruding from the back surface (base end portion 120). By embedding the undercut portion having the side surface 124 in the artificial gingival portion 704, the bearing portion 30 is favorably prevented from falling off from the artificial gingival portion 704. For example, it is possible to avoid unnecessary gaps being formed between the surface of the artificial gingival part 704 and the bearing part 30 by embedding the entire undercut part 122 in the artificial gingival part 704.

  The second denture base 20 in this embodiment includes an artificial gingival part 704, a shaft body 40, and a second holding part 60. The second denture base 20 in the present embodiment does not straddle the alveolar ridge 701 and is disposed on the buccal side or the lingual side (specifically in the present embodiment, the buccal side).

  The shaft body 40 in the present embodiment has a shaft portion 42. The shaft portion 42 can be inserted and supported on the inside of the bearing portion 30 through the entrance / exit opening 31 provided in the bearing portion 30.

  The shaft portion 42 in the present embodiment is cylindrical. The circular arc radius of the cylindrical shaft portion 42 is substantially equal to the circular arc radius of the inner periphery of the side peripheral portion 80 in the bearing portion 30. As a result, the shaft portion 42 can be stably supported on the inner periphery of the side peripheral portion 80 so as to be rotatable.

As shown in FIG. 5, the shaft main body 40 includes a shaft portion 42 and a support portion 90 extending from the shaft portion 42 in a direction different from the axial direction of the shaft portion 42.
The support portion 90 in the present embodiment has a clamping portion 92 that protrudes from an end region near the shaft portion 42 and extends substantially parallel to the axial direction of the shaft portion 42. The pitch 94 between the clamping part 92 and the shaft part 42 is extremely small, for example, equal to or smaller than the outer diameter of the clamping part 92.
Alternatively, the pitch 94 may be the same as or slightly larger than the thickness 96 of the side peripheral portion 80 provided in the bearing portion 30 shown in FIG. When the thickness 96 of the side periphery 80 is not uniform, the pitch 94 may be the same or slightly larger than the maximum dimension of the thickness 96.
In the present invention, the end region near the shaft portion 42 of the support portion 90 means a predetermined length region including the end portion on the side where the shaft portion 42 is provided. The pitch 94 is a distance between adjacent edges of the sandwiching portion 92 and the shaft portion 42.

  The present invention also includes a single body of the shaft body 40 used for the partial denture 100. The shaft main body 40 of the present invention can be a target of commercial transactions together with a single body or other members. For example, a single shaft body 40 can be provided as an important part of the partial denture 100 to a person who manufactures the partial denture 100 of the present invention. From this point of view, the present invention also includes a shaft body manufacturing mold (not shown) having the same shape as the shaft body 40 and for manufacturing the shaft body 40. For the shaft body 40 as a single body of the present invention, the description of the shaft body 40 provided in the partial denture 100 according to the present embodiment is appropriately referred to.

  Part or all of the support part 90 is embedded in the artificial gingival part 704, whereby the shaft body 40 is fixedly installed on the artificial gingival part 704. Although the support part 90 in this embodiment is a rod-shaped body extended in one direction, it is not limited to this. The rod-like body may be a cylinder, a prism, or a columnar body having an arbitrary cross section. In the present embodiment, the shaft portion 42 and the support portion 90 are orthogonal to each other. The shaft portion 42 extends with an approximately equal length in the opposite direction around the intersection of the support portion 90 and the shaft portion 42. The length here means the axial center length of the shaft portion 42.

  Although the member which comprises the axis | shaft main body 40 is not specifically limited, For example, it is preferable that it is a metal material from a viewpoint of giving sufficient intensity | strength. Examples of the metal material include, but are not limited to, cobalt / chromium, gold, and titanium.

When the shaft body 40 is formed of a metal material, an appropriate metal can be poured into a previously formed casting mold and cast. When manufacturing the shaft body 40, the metal bed of the first denture base 10 or the second denture base 20 provided with the shaft body 40 may be cast integrally.
Also, other members such as the anchor 170 may be cast as a pair with the shaft body 40. In the case of casting each member integrally in this way, for example, a die body is created by fixing the die body of each member to a predetermined position by bonding or the like to the shaft body manufacturing die body. To do. A metal member in which another member is integrated with the shaft main body 40 can be manufactured by creating a mold using the integrated mold and casting it. If necessary, the first denture base 10 or the second denture base 20 can be created by placing a resin on a predetermined portion of the metal member.

When the shaft body 40 is manufactured using the shaft body manufacturing mold, a so-called lost wax casting method may be employed. That is, a shaft body manufacturing mold body (waxable shaft body manufacturing mold body) made of a wax (wax) member is covered with cast sand, and then fired to remove the shaft body manufacturing mold body and remove the mold. The shaft main body 40 can be manufactured by forming a metal and pouring metal into it.
Alternatively, when a shaft body manufacturing mold body made of a member other than the wax (for example, a resin material such as silicone rubber) is used, a plurality of wax shaft body manufacturing mold bodies made of wax may be created using this. One shaft main body mold can be used effectively.

In the support portion 90 in this embodiment, two or more embedding portions 160 that protrude from the peripheral surface of the support portion 90 and are planned to be embedded in the artificial gingival portion 704 are provided at different positions in the extending direction of the support portion 90. . Since the embedded portion 160 is embedded in the artificial gingival portion 704, the support portion 90 is prevented from falling off the artificial gingival portion 704.
Although not shown in the drawings, this embodiment includes a mode in which the embedding portion 160 is not provided. For example, the shaft main body 40 that is the object of the commercial transaction is not provided with the embedded portion 160 in advance, and the denture base manufacturer who has obtained it can later form the embedded portion 160 at a position suitable for each denture base. . Alternatively, instead of providing the embedding portion 160, a predetermined portion of the support portion 90 embedded in the artificial gingival portion 704 is slightly bent or bent, so that the support portion 90 moves straight from the artificial gingival portion 704 in the straight direction. It can be made difficult to pull out.

  In the present embodiment, at least one end of the shaft portion 42 may be hemispherical. For example, as shown in FIG. 5, the shaft portion 42 has, as one end portion, a cut surface end portion 42 a having a cut surface shape cut substantially perpendicularly to the axial direction of the shaft portion 42, and the other end. As a part, it has a hemispherical end portion 42b having a hemispherical shape. The hemisphere here is not limited to a strict hemisphere, but includes a partial elliptical sphere, a perfect sphere, an oval, etc. beyond the R chamfering of the end of the shaft portion 42, Widely includes curved ends protruding in the axial direction.

Making the end portion of the shaft portion 42 a hemispherical end portion 42 b contributes to smoothly rotating the shaft portion 42 inserted into the bearing portion 30 in the space 116. Particularly, by making the arc radius of the hemispherical end portion 42b substantially the same as the arc radius of the curved inner circumference of the side peripheral portion 80, the shaft portion 42 can be smoothly rotated.
On the other hand, by setting the end portion of the shaft portion 42 as the cut surface end portion 42a, the cut surface end portion 42a of the rotating shaft portion 42 is brought into contact with the curved inner periphery of the side peripheral portion 80 to rotate. It is possible to regulate.
Although not shown in the drawings, the present invention includes a mode in which all of the end portions of the shaft portion 42 are hemispherical end portions 42b and a mode in which all of the end portions of the shaft portion 42 are cut surface end portions 42a.

Next, the first holding unit 50 and the second holding unit 60 will be described.
The 1st holding | maintenance part 50 and the 2nd holding | maintenance part 60 regulate rocking | fluctuation of the 2nd denture base 20 with respect to the 1st denture base 10 by hold | maintaining mutually. The holding state of the first holding unit 50 and the second holding unit 60 can be manually released.

For example, the first holding part 50 and the second holding part 60 in the present embodiment have a fitting structure that is detachably engaged in the swinging direction of the second denture base 20 that swings with respect to the first denture base 10. Eggplant. With this structure, the attaching / detaching direction is determined as the swinging direction, so that the state of engagement in the oral cavity is stabilized.
In particular, when the second denture base 20 is disposed on the cheek side of the remaining teeth 702 or the artificial teeth 708 and the second axial direction 114 of the shaft portion 42 is substantially occlusal, the second denture base 20 The swinging direction is a direction that goes back and forth between the remaining tooth 702 side and the cheek side. That is, since there is a cheek in the swinging direction in which the engagement between the first holding part 50 and the second holding part 60 is released, the engagement between the first holding part 50 and the second holding part 60 is maintained well. Can be done. In addition, even if the engagement between the first holding part 50 and the second holding part 60 is released in the oral cavity, the second denture base 20 is difficult to swing to the buccal side due to the presence of the cheeks. The second denture base 20 is prevented from being detached from the first denture base 10.

One specific example of the first holding part 50 and the second holding part 60 which are the fitting structures described above is as follows (see FIG. 2).
That is, the 1st holding | maintenance part 50 has a pair of wire 130 constructed by the surrounding surface of the 1st denture base 10 or the 2nd denture base 20 (specifically 1st denture base 10 in this embodiment). On the other hand, the second holding part 60 protrudes from the peripheral surface of the first denture base 10 or the second denture base 20 (specifically, the second denture base 20 in the present embodiment) that does not have the first holding part 50. A protrusion 132 is provided. At the distal end portion of the protruding portion 132, a bulging portion 134 having an outer diameter larger than the distance between the pair of wires 130, and located on the proximal side of the bulging portion 134, is larger than the outer diameter of the bulging portion 134. It has a bend portion 136 having a small outer diameter.
At this time, the width of the pair of wires 130 may be made smaller than the outer diameter of the bent portion 136 located on the proximal end side of the bulging portion 134. As a result, when the bulging portion 134 passes through the pair of wires 130 and the pair of wires 130 and the anchor 170 are held, the first wire 130a and the second wire 130b, and the bulging portion 134 Are brought into contact with each other, and the holding state is stabilized.

  As shown in FIG. 2, the pair of wires 130 are provided on the surface of the artificial gingival portion 704 of the first denture base 10, and the protruding portion 132 is the back surface of the second denture base 20, that is, the first denture base 10. It is provided on the surface facing. The protruding part 132 is a part that forms part of the anchor 170 and is exposed from the artificial gingival part 704 of the second denture base 20.

  The user swings the second denture base 20 mounted on the first denture base 10 toward the first denture base 10 and tilts it along the artificial gingival portion 704 of the first denture base 10. Then, by applying an appropriate pressing force, the bulging portion 134 is passed between the pair of wires 130 to fit them together. Thereby, it can be set as the state which engaged the 2nd holding | maintenance part 60 (anchor 170) with respect to the 1st holding | maintenance part 50 (a pair of wire) (refer FIG. 4). The protruding portion 132 has a diameter that increases from the bent portion 136 toward the proximal end side. Thereby, after the bulging portion 134 passes through the pair of wires 130, the intrusion of the protruding portion 132 with respect to the pair of wires 130 stops at or near the bent portion 136.

  The middle part of the pair of wires 130 is separated from the artificial gingival part 704 of the first denture base 10 (not shown). The separation distance is, for example, not less than the length dimension of the bulging portion 134 (dimension from the distal end to the proximal end). The bulging portion 134 that passes through and fits between the pair of wires 130 is located between the surface of the artificial gingival portion 704 of the first denture base 10 and the wire 130.

  In the first holding part 50 and the second holding part 60 that form the fitting structure, in the aspect in which the configuration corresponding to the recesses is the pair of wires 130 as described above, food recesses are not easily clogged in the recesses, and cleaning is performed. It is also easy and hygienic.

  The ends of the first wire 130a and the second wire 130b constituting the pair of wires 130 are provided on the first denture base 10 or the second denture base 20 (specifically, in the present embodiment, the first denture base 10). Installed in the artificial gingival portion 704. In the present embodiment, the end portions of the first wire 130a and the second wire 130b are installed to be slidable in the pulling direction with respect to the artificial gingival portion 704. When the bulging portion 134 passes between the pair of wires 130, the bulging portion 134 pushes and spreads the first wire 130a and the second wire 130b away from each other. At the same time, a part of the end region of both wires slides out of the first denture base 10 (withdrawing direction) and is pulled out. Thereby, since the distance of the 1st wire 130a and the 2nd wire 130b spreads slightly, it can let the bulging part 134 pass smoothly.

In the partial denture 100, the length of the pair of wires 130 exposed on the peripheral surface of the first denture base 10 or the second denture base 20 (specifically, the first denture base 10 in the present embodiment) is the bulging portion. By exceeding the outer diameter of 134, the following advantageous effects are exhibited. In other words, the bulging portion 134 can be passed between the pair of wires 130 even if the opposing positions of the first holding portion 50 and the second holding portion 60 are slightly shifted. Therefore, the alignment accuracy of the first holding part 50 and the second holding part 60 at the time of manufacturing can be relaxed, which is advantageous in manufacturing. From this point of view, it is preferable that the length of the pair of wires 130 exposed on the peripheral surface is significantly larger than the outer diameter of the bulging portion 134. Here, the length of the bulging portion 134 exposed from the peripheral surface here means the distance between the exposed end portions of the first wire 130a and the second wire 130b exposed from the artificial gingival portion 704. When there is a difference in the distance between the first wire 130a and the second wire 130b, the shorter distance is indicated.
For example, in order to secure the length of the exposed pair of wires 130, either one end of the first wire 130 a or the second wire 130 b is longer than the length (non-exposed length) installed in the artificial gingival portion 704. The exposed part may be lengthened. Thereby, the passage region of the bulging portion 134 with respect to the pair of wires 130 can be sufficiently provided in the length direction of the pair of wires 130. In other words, according to the above-described aspect, the position where the bulging portion 134 faces the pair of wires 130 is allowed to be slightly shifted in the length direction of the pair of wires 130.
Further, from the viewpoint of sufficiently increasing the holding force between the pair of wires 130 and the anchor 170 having the bulging portion 134, the length of the pair of wires 130 exposed to the peripheral surface is adjusted in a direction of appropriately shortening. It is preferable. From such a viewpoint, for example, the length of the pair of wires 130 exposed on the peripheral surface is preferably not less than the outer diameter of the bulging portion 134 and not more than twice the outer diameter of the bulging portion 134. The outer diameter of 134 is more preferably 1.5 times or less the outer diameter of the bulging portion 134.

In addition, although not shown, a concave portion and a convex portion may be provided to fit with each other in the artificial gingival portion 704 of the first denture base 10 and the artificial gingival portion 704 of the second denture base 20 facing the artificial gingival portion 704. . By fitting the concave portion and the convex portion, the first denture base 10 and the second denture base 20 can be quickly guided so as to face each other at a predetermined position.
As a more specific example, a concave portion along the pair of wires 130 in the artificial gingival portion 704 of the first denture base 10 located near the outside of the first wire 130a and / or the second wire 130b constituting the pair of wires 130. May be provided. At the same time, a convex portion that can be engaged with the concave portion may be provided on the artificial gingival portion 704 of the second denture base 20 that is a portion facing the concave portion. By fitting the convex portion and the concave portion, the bulging portion 134 can be guided so as to face the pair of wires 130 at a correct position. That is, by providing the concave portion and the convex portion, the bulging portion 134 is prevented from being displaced in the crossing direction of the pair of wires 130.

  In the present embodiment, an example in which the pair of wires 130 is used for the first holding unit 50 and the anchor 170 is used for the second holding unit 60 has been shown, but the present invention uses the anchor 170 for the first holding unit 50, The aspect which uses a pair of wire 130 for the 2nd holding | maintenance part 60 is included.

  The first holding unit 50 and the second holding unit 60 described above also contribute to fixing the position of the second denture base 20 with respect to the first denture base 10. However, the position is fixed by, for example, the gingival boundary engaging portion 710 (see FIG. 1A) in the artificial gingival portion 704 provided in the first denture base 10 or the second denture base 20, the remaining teeth 702, and the gums. It is also secured by engagement with the boundary (or the vicinity thereof) 703. The gingival boundary engaging portion 710 refers to a portion of the artificial gingival portion 704 that is formed to engage with the boundary (or the vicinity thereof) between the remaining tooth 702 and the gum 703.

  Next, regarding the attaching / detaching operation of the first denture base 10 and the second denture base 20, an operation at the time of mounting the second denture base 20 on the first denture base 10 will be described as an example with reference to FIG. FIG. 8 is an explanatory view illustrating the operation of mounting the shaft main body 40 on the bearing portion 30 step by step.

  FIG. 8A shows a state before the shaft portion 42 of the shaft main body 40 is inserted in the loading / unloading direction 112 with respect to the bearing portion 30. The entrance / exit direction 112 is substantially the same direction as the first axial direction 110. First, as shown in FIG. 8A, the longitudinal direction of the shaft portion 42 is made to follow the entrance / exit direction 112 with respect to the entrance / exit opening 31. Then, the shaft portion 42 is inserted into the access opening 31. One end of the shaft portion 42 in the present embodiment is a cut surface end portion 42a, which serves as an insertion tip. The insertion rear end of the shaft portion 42 is, for example, a hemispherical end portion 42b as illustrated.

  FIG. 8B shows a state in which the shaft portion 42 is inserted into the bearing portion 30, and shows a state before the shaft portion 42 is rotated in the rotation direction 117. At this time, the position of the center A of the shaft portion 42 is at the first position A1 located at the center of the space 116 in the entrance / exit direction 112 or in the vicinity thereof. Here, the center A refers to a half of the longitudinal direction on the axis of the shaft portion 42. The first position A <b> 1 refers to a position where the center A of the shaft portion 42 that can rotate in the space 116 exists.

FIG. 8C shows a state in which the shaft portion 42 inserted into the bearing portion 30 is rotated, and shows a state before the shaft main body 40 is moved in the moving direction 118.
The shaft main body 40 is operated in the rotation direction 117 shown in FIG. As a result, as shown in FIGS. 8B and 8C, the axial direction of the shaft portion 42 changes in the space 116. The rotation direction 117 is a direction in which the support portion 90 can be rotated and the shaft portion 42 can be rotated in the space 116. In the present embodiment, the shaft portion 42 is rotated by approximately 90 °. In the present embodiment, the rotation direction of the shaft portion 42 is restricted to be one direction.

That is, in the partial denture 100, the shaft portion 42 that rotates in the inner side (that is, the space 116) abuts on the inner side of the bearing portion 30 to thereby restrict the rotation direction of the shaft portion 42 (see FIG. 6 and FIG. 8). The restriction portion 70 is a convex portion that is provided on the right side of the entrance / exit opening 31 when viewed from the front of the bearing portion 30 and protrudes toward the space 116 from the inner periphery of the bearing portion 30.
The partial denture 100 provided with the restricting portion 70 allows or restricts the following rotation of the shaft portion 42.
That is, the restricting portion 70 allows the shaft portion 42 to transition from the first axial direction 110 to the second axial direction 114 when the shaft portion 42 rotates in a predetermined direction, and also allows the second axial direction 114 to Transition to the uniaxial direction 110 is restricted.
The restricting portion 70 restricts the shaft portion 42 from transitioning from the first axial direction 110 to the second axial direction 114 as the shaft portion 42 rotates in a direction opposite to the predetermined direction, and the second direction. Transition from the axial direction 114 to the first axial direction 110 is allowed.

As described above, by allowing and restricting the rotation of the shaft portion 42 inside the bearing portion 30, it is possible to guide the second denture base 20 to be mounted on the first denture base 10 in a correct posture.
That is, the artificial gingival part 704 of the second denture base 20 in the present embodiment has the second holding part 60 on the side facing the first denture base 10. The second denture base 20 needs to be mounted in the correct orientation with respect to the first denture base 10 so that the second holding portion 60 faces the first holding portion 50. However, after the shaft portion 42 is inserted into the bearing portion 30 with the predetermined end portion as the insertion tip and assumes a posture in the first axial direction 110, the shaft extends in the same direction beyond a desired angle (90 ° in the present embodiment). When the part 42 rotates, the following problems may occur. That is, the shaft portion 42 that has passed the position in the second axial direction 114 again indicates the first axial direction 110, and subsequently indicates the second axial direction 114 again. When the second denture base 20 is swung with respect to the first denture base 10 with the shaft portion 42 indicating the second axial direction 114 again, the second holding portion 60 does not face the first holding portion 50. , Facing the cheek side, can not be installed in the correct orientation. On the other hand, the restricting portion 70 restricts the shaft portion 42 from rotating beyond a desired angle, and can prevent such a mistake in mounting the second denture base 20.
Further, since the shaft portion 42 is prevented from freely rotating in the space 116, the shaft portion 42 is detached from the entrance / exit opening 31 due to an unexpected operation, so that the second denture base 20 is moved from the first denture base 10. Suppresses withdrawal.

FIG. 8D shows that the shaft portion 42 is pivotally supported in the moving direction 118 by moving the shaft portion 42 in the moving direction 118 so that the center A is closer to the side peripheral portion 80, and then the shaft portion 42 is swung in the swinging direction 119. Indicates the moved state.
The inner periphery of the side peripheral portion 80 is curved and is a concave portion adapted to the peripheral surface of the shaft portion 42, and the shaft portion 42 can be received so as to be pivotally supported. For example, the arc radius of the inner periphery of the side peripheral portion 80 and the arc radius of the shaft portion 42 are substantially equal.
By tilting the shaft body 40 in the swing direction 119 shown in FIG. 8D, the second denture base 20 (not shown) is swung with respect to the first denture base 10, and then the first holding portion 50 (not shown). And the second holding part 60 are held together to complete the mounting.

  The partial denture 100 according to the present embodiment includes a first position A1 (FIGS. 8B and 8C) where the center A of the shaft portion 42 is located, and a second position A2 where the center A is located (FIG. 8 (d)) is different. The first position A1 is a position where the center A of the shaft portion 42 that is rotatably inserted into the bearing portion 30 via the access opening 31 is located. The second position A2 is a position where the center A of the shaft portion 42 that is pivotally supported by the bearing portion 30 so that the second denture base 20 can swing relative to the first denture base 10 is located. Accordingly, in order to remove the shaft portion 42 pivotally supported by the bearing portion 30 from the entrance / exit opening 31, the center A must be changed from the second position A2 to the first position A1. Therefore, it is difficult for the shaft main body 40 to be detached from the bearing portion 30 unintentionally in the oral cavity.

  More specifically, the center A of the shaft portion 42 can be shifted in the space 116 to a first position A1 that is closer to the center of the space 116 and a second position A2 that is closer to the side periphery 80. It is. The shaft portion 42 is rotatable when the center A is at the first position A1, and is not rotatable when the center A is at the second position A2, and is pivotally supported by the bearing portion 30 so as to be rotatable. The first position A1 and the second position A2 are not limited to specific fixed points, and can be included in a predetermined range.

  Further, as described above, the partial denture 100 according to the present embodiment rotates the shaft portion 42 in the space 116 to rotate the first axial direction 110 (see FIG. 5) and the second axial direction 114 (see FIG. 5). ) And transition. That is, as shown in FIG. 8B, the axial direction of the shaft portion 42 inserted into the bearing portion 30 through the access opening 31 indicates the first axial direction 110 that is substantially the same direction as the access direction 112. The shaft portion 42 is rotated in the space 116 to a direction that can be pivotally supported by the bearing portion 30, so that the axial direction is the second axial direction 114 as shown in FIGS. 8C and 8D. Become.

By the way, in the present embodiment in which the inner periphery of the side peripheral portion 80 is appropriately curved, the following effects can be exhibited by setting the end portion on the insertion tip side of the shaft portion 42 as the cut surface end portion 42a. That is, when the shaft portion 42 is rotated in the rotation direction 117 as shown in FIGS. 8B and 8C, if the shaft portion 42 is rotated more than a desired rotation angle, The cut surface end portion 42 a can abut on the side peripheral portion 80. Therefore, excessive rotation of the shaft portion 42 can be restricted.
Further, in the aspect in which the cut end 42a is the insertion tip, the user mistakenly uses the hemispherical end 42b as the insertion tip and inserts the shaft portion 42 into the entrance / exit opening 31 and rotates it in the rotation direction 117. In this case, 42a that is the rear end of the insertion can come into contact with the side peripheral portion 80. Therefore, the rotation of the shaft portion 42 is restricted, and the user can immediately notice that the insertion direction is wrong. When the shaft portion 42 is in the second axial direction 114, the shaft portion 42 cannot enter and exit from the access opening 31.

As described above, the bearing portion 30 has the side peripheral portion 80 that supports the shaft portion 42 so as to be capable of rotating the shaft. Comprises a support 90 extending in different directions.
The support portion 90 has a holding portion 92 that protrudes from an end region near the shaft portion 42 and extends substantially parallel to the axial direction of the shaft portion 42. A pitch 94 (see FIG. 5) between the sandwiching portion 92 and the shaft portion 42 is substantially equal to the thickness of the side peripheral portion 80.
As shown in FIG. 8D, the side peripheral portion 80 can be sandwiched between the shaft portion 42 and the clamping portion 92 in a state where the shaft portion 42 is pivotally supported on the bearing portion 30. Thereby, the mounting position of the shaft main body 40 with respect to the bearing portion 30 is difficult to shift.

<Second embodiment>
FIG. 9 is a perspective view of the partial denture 200 according to the second embodiment of the present invention. In this embodiment, the aspects of the first holding unit 50 and the second holding unit 60 are different from those of the first embodiment, and other configurations of the present embodiment adopt the configuration of the first embodiment as appropriate. can do.

The first holding unit 50 and the second holding unit 60 in the present embodiment each have an adsorption surface provided with a magnet or a magnetic body that magnetically adsorb each other, and is suitable for repeated attachment and detachment.
The first holding part 50 and the second holding part 60, which are magnets, are not only separated in a direction perpendicular to the surface direction, but may be separated in parallel to the surface direction, and the separation direction is not restricted. Have Due to the above characteristics, various attachment / detachment directions are possible according to the complicated three-dimensional shape in the oral cavity. Moreover, you may adjust the direction of attachment / detachment by making a mutual uneven | corrugated engagement into a gentle uneven | corrugated engagement as needed.

  On the other hand, attraction between magnets or between a magnet and a magnetic material has a problem that due to the above characteristics, it is easily separated in the oral cavity by receiving force from various directions. However, in the present embodiment, the shaft portion 42 is pivotally supported by the bearing portion 30, and there is a prescribed operation direction in which the second denture base 20 swings in a predetermined direction with respect to the first denture base 10. Further, the attaching / detaching direction of the first holding part 50 and the second holding part 60 can also be defined along with the swinging direction.

  The first holding part 50 in the partial denture 200 is a first magnet 142 having a first attracting surface 144, and the second holding part 60 is a second magnet 146 having a second attracting face 148. By the first suction surface 144 and the second suction surface 148 adsorbing each other, the swing of the second denture base 20 with respect to the first denture base 10 is regulated. In the present embodiment, the term “magnet” in the first magnet 142 and the second magnet 146 is for convenience. The two may be in any relationship as long as they can be attracted by a magnetic force. For example, one may be a magnet and the other may be a magnetic body attracted by the magnet's magnetic force, or both may be magnets that attract each other.

  Examples of the magnet include a permanent magnet, but are not limited thereto. As the permanent magnet, a neodymium magnet (NdFeB magnet) can be used. On the other hand, examples of the magnetic material include, but are not limited to, a ferromagnetic metal such as soft magnetic stainless steel.

  For example, the shape of the first attracting surface 144 that is the magnetic pole surface of the first magnet 142 that is a permanent magnet is not particularly limited, but may be a circle having a diameter of 2 mm or more and 3 mm or less. On the other hand, it is preferable that the 2nd adsorption | suction surface 148 is the same shape and dimension as the said permanent magnet. As a result, when the first magnet 142 and the second magnet 146 are magnetically attracted, the first attracting surface 144 and the second attracting surface 148 can be brought into close contact without relatively shifting in the in-plane direction.

  In the present embodiment, the first attracting surface 144 and the second attracting surface 148 are provided with a magnet or a magnetic body exposed to be flush with each other. In addition, for example, the first suction surface 144 and the second suction surface 148 may have smooth curved shapes corresponding to each other.

<Third embodiment>
FIG. 10 is a perspective view of a partial denture 300 according to the third embodiment of the present invention, and FIG. 11A is a perspective view of a sheath 150 used for the partial denture 300. FIG. These are bb sectional drawing of Fig.11 (a). In FIG. 11, the support part 90 fitted to the sheath part 150 is indicated by a virtual line. The present embodiment is different from the first embodiment in that the sheath 150 is provided, and the configuration of the first embodiment can be appropriately adopted as the other configuration of the present embodiment.

  In the partial denture 300 according to the present embodiment, the first denture base 10 or the second denture base 20 (specifically, the first denture base 10 in the present embodiment) provided with the bearing portion 30 is an artificial gingival portion 704. A sheath portion 150 that accommodates a predetermined portion of the shaft main body 40 exposed from. Thereby, the shaft main body 40 can be protected in the oral cavity.

The sheath 150 in the present embodiment has a groove shape. The sheath 150 communicates in one direction and has an opening 152 on the upper surface. The sheath 150 is arranged in a direction in which the longitudinal direction connects the shaft body 40 and the first holding part 50, and the surface side of the first denture base 10 so that the opening 152 is exposed from the artificial gingival part 704. Is installed.
In the second denture base 20 in the partial denture 300, a part (rod-like portion) of the support portion 90 is exposed between the shaft portion 42 and the artificial gingival portion 704. In a posture in which the second denture base 20 is mounted on the first denture base 10, the exposed support portion 90 is accommodated in the sheath 150 having a groove shape through the opening 152 (see FIG. 11).

For example, the sheath 150 may have a semicircular, semi-elliptical, semi-elliptical cross section, or the like. Part or all of the support portion 90 is accommodated on the groove inner periphery 158 side which is the inside of the opening 152. Preferably, the depth of the groove inner periphery 158 is equal to or greater than the outer diameter of the support 90 accommodated, and the position of the apex of the support 90 fitted to the sheath 150 is equal to or less than the height of the opening 152. .
Part or all of the groove outer periphery 156 of the sheath 150 is embedded in the artificial gingiva 704 and is not visually observed.

  An embedded portion 154 is provided at a predetermined position of the groove outer periphery 156. The embedded portion 154 is a member that is embedded in the artificial gingival portion 704 and extends in a direction different from the longitudinal direction of the sheath portion 150. In the present embodiment, two minute long bodies extending in a direction substantially perpendicular to the longitudinal direction of the sheath 150 are provided in contact with the vicinity of the apex of the groove of the sheath 150. The long body is, for example, a plate-like body, and one main surface of the plate-like body faces the opening 152. Since the embedded portion 154 is embedded in the artificial gingival portion 704, the sheath portion 150 is prevented from falling off the artificial gingival portion 704.

  In this embodiment, the opening width of the opening 152 is equal to or larger than the outer diameter of the support portion 90 fitted to the sheath portion 150. Accordingly, the support portion 90 can be smoothly accommodated in the groove inner periphery 158 of the sheath portion 150.

As a modification of the present embodiment, the opening width of the opening 152 may be less than the outer diameter of the support portion 90 as long as the support portion 90 can pass through. Thereby, the sheath part 150 and the support part 90 make the fitting structure which can be engaged.
In such a modification, the sheath portion 150 can function as the first holding portion 50, and the support portion 90 can function as the second holding portion 60. Therefore, in combination with the first holding part 50 and the second holding part 60 of another aspect, an aspect including the sheath part 150 and the support part 90 that are held together is adopted, and the second denture base with respect to the first denture base 10 is adopted. The control of the swing of 20 can be achieved more sufficiently.
Or the 1st holding | maintenance part 50 and the 2nd holding | maintenance part 60 which abbreviate | omit the 1st holding | maintenance part 50 and the 2nd holding | maintenance part 60 of another aspect, and function as the 1st holding | maintenance part 50 and the 2nd holding | maintenance part 60. Oscillation of the second denture base 20 with respect to may be restricted.

<Fourth embodiment>
Next, 4th embodiment of the partial denture 100 of this invention and its modification are described using FIGS. 12-15. The fourth embodiment can be carried out in the same manner as the first embodiment except that the bearing portion 30 is different in the points described later. Therefore, about 4th embodiment, the bearing part 30 is demonstrated and description about the other structure of the partial denture 100 is omitted. Reference numerals relating to configurations other than the bearing portion 30 are referred to FIGS. 1 to 8 as appropriate.
FIG. 12 is a top view of the metal plate 400 for constituting the bearing portion 30 in the present embodiment. FIG. 13A is a top view of the bearing portion 30 in the present embodiment, FIG. 13B is a left side view of the bearing portion 30, and FIG. 13C is a front view of the bearing portion 30. FIG. 14 is a top view of the metal plate 410 for constituting the bearing portion 30 which is a modification of the present embodiment. FIG. 15A is a top view of a bearing 30 that is a modification of the present embodiment, and FIG. 15B is a left side view of the bearing 30.

The bearing portion 30 in the present embodiment is composed of a single metal plate 400.
More specifically, for example, like the metal plate 400 shown in FIG. 12, the bearing portion 30 shown in each drawing of FIG. 13 is configured from a single metal plate 400. The bearing portion 30 includes a proximal end portion 120 that is in contact with or embedded in the artificial gingival portion 704, and a side peripheral portion 80 that supports the shaft portion 42 so as to be rotatable. The metal plate 400 corresponding to this has a first region 412 that constitutes the base end portion 120 and a second region 414 that constitutes the side peripheral portion 80.
That is, the metal plate 400 has a configuration as a development view of the bearing portion 30. As described above, the bearing portion 30 in the present embodiment can be formed by assembling a single metal plate 400 in accordance with the configuration without using a casting mold or an injection molding die, and thus can be easily formed. is there. Moreover, since the bearing 30 formed in this way is linked in series with a metal plate as a whole, partial drop-off is unlikely to occur.

The bearing portion 30 may be formed into a three-dimensional shape by bending or bending the metal plate 400 at a predetermined location, and adjacent or overlapping metal portions may be welded as necessary. In FIG. 13 and FIG. 15 which shows a modified example which will be described later, the location of welding is not shown.
Below, the metal plate 400 which comprises the bearing part 30, and the structure of the bearing part 30 comprised by the metal plate 400 are demonstrated in detail.

  As shown in FIG. 12, the metal plate 400 is composed of a single metal plate having a predetermined shape. The metal plate 400 has a first region 412 that forms the base end portion 120 of the bearing portion 30, a second region 414 that forms the side peripheral portion 80, and a third region 416 that forms the top plate portion 121. An opening formed by pulling out the center from the second region 414 to the third region 416 is an opening 415 that forms the access opening 31. The following bearing part 30 can be comprised with the metal plate 400 which has these structures. The metal plate 400 has the first region 412 as a lower surface and the third region 416 is positioned above the first region 412 while curving the second region 414, whereby the base end portion 120, the side peripheral portion 80, The top plate part 121 and the side periphery part 80 are made. In the present embodiment, the vertical direction when describing the configuration of the bearing portion 30 is when the base end portion 120 is on the lower side and the top plate portion 121 is on the upper side unless otherwise specified. Means direction.

The metal forming the metal plate 400 can be appropriately selected from metals that can be used in the oral cavity. Examples of the metal include, but are not limited to, a corrosion-resistant metal such as stainless steel or titanium, or an alloy made of gold, silver, palladium, or a combination of two or more thereof. As a metal constituting the metal plate 400 when considering bending the metal plate 400 into the shape of the bearing portion 30 and then welding an arbitrary portion to fix the configuration of the bearing portion 30, In particular, stainless steel is a suitable metal.
The thickness of the metal plate 400 is not particularly limited, and may be appropriately determined within a range in which the function as the shaft portion 42 is achieved when the bearing portion 30 is configured. The thickness of the metal plate 400 is in the range of 0.1 μm or more and μm or less from the viewpoint that it is easy to bend in order to configure the bearing portion 30 from the metal plate 400 while considering the strength of the bearing portion 30. Is preferred.

The bearing portion 30 (see FIG. 13) of the present embodiment has a top plate portion 121 that faces the base end portion 120. The metal plate 400 corresponding to this aspect has a third region 416 that constitutes the top plate portion 121.
As shown in FIG. 12, in the metal plate 400, the first region 412 that forms the base end portion 120 and the top plate portion 121 that forms the top surface via the second region 414 that forms the side peripheral portion 80. Three regions 416 are adjacent.
In the present embodiment, the fact that one region of the metal plate 400 and another region are adjacent means that two adjacent regions are continued on the metal plate.

As described above, the bearing portion 30 constituted by the single metal plate 400 includes the side peripheral portion 80, the base end portion 120 and the top plate portion 121 adjacent to the side peripheral portion 80, and a series of metal materials constituting the metal plate 400. It is configured. For this reason, even when a load is applied to the side peripheral portion 80 when the shaft portion 42 is supported so as to be rotatable, the bearing portion 30 exhibits high strength and causes damage to the side peripheral portion 80 or the vicinity thereof. hard.
In the metal plate 400, when the first region 412 and the second region 414 are not adjacent to each other, or when the second region 414 and the third region 416 are not adjacent to each other, By welding at the boundary between the base end portion 120 and the side peripheral portion 80 or the boundary between the side peripheral portion 80 and the top plate portion 121, the strength of the side peripheral portion 80 can be improved. However, it is preferable to pay sufficient attention during the welding operation so that the unevenness of the welded portion (not shown) does not hinder the operation of the shaft portion 42 supported by the side peripheral portion 80. On the other hand, as described above, when the side peripheral portion 80 and the base end portion 120 and the top plate portion 121 adjacent to the side peripheral portion 80 are configured in series by a metal material, the welding operation having the above-mentioned matters of note is performed. Don't do it.

The metal plate 400 in the present embodiment further includes a fourth region 418 and a fifth region 420. The fourth region 418 forms the back surface portion 125 in the bearing portion 30, and the fifth region 420 forms the restricting portion 70. The back surface portion 125 is a portion facing the side peripheral portion 80 in the bearing portion 30. For example, in FIG. 13C, which is a front view of the bearing portion 30, the back surface portion 125 is visually recognized in the depth direction at the entrance / exit opening 31.
The fourth region 418 and the fifth region 420 can be provided in any region of the metal plate 400 as long as the bearing portion 30 can be configured. In the present embodiment, as shown in FIG. 12, a fifth region 420 is provided adjacent to the third region 416, and a fourth region 418 is provided adjacent to the fifth region 420.

  The bearing portion 30 of the present embodiment configured using the metal plate 400 described above is brought into contact with the top plate portion 121 facing the base end portion 120 and the shaft portion 42 that rotates inside the bearing portion 30. A restricting portion 70 that restricts the rotation direction of the shaft portion 42 is provided. In addition, the corresponding metal plates 400 and 410 are provided with a third region 416 constituting the top plate portion 121. The region (fifth region 420) forming the restricting portion 70 in the present embodiment is provided adjacent to the first region 412 or the third region 416 in the metal plate 400 (see FIGS. 12 and 14). The restricting portion 70 is disposed inside the outer edge of the base end portion 120 in the bearing portion 30 and is bent in a direction across the base end portion 120 and the top plate portion 121. Thus, by providing the fifth region 420 constituting the restricting portion 70 in one metal plate 400, the restricting portion 70 can be integrally provided in the bearing portion 30.

For example, in the metal plate 400, the fifth region 420 forming the restricting portion 70 can be provided adjacent to the third region 416 forming the top plate portion 121 as shown in FIG. The fifth region 420 can constitute the restricting portion 70 by bending a line 421 that is a boundary line between the third region 416 and the fifth region 420 in a predetermined direction.
In the metal plate 400, the line 421 is substantially parallel to the outer edge 422 of the first region 412 and is located inside the outer edge 422. Further, the line 421 is provided inside the outer edge 423 of the second region 414 and the outer edge 424 of the third region 416. The outer edges 422, 423, and 424 of the respective regions referred to here indicate edge portions that are symmetrical with respect to the central axis 490 in the longitudinal direction of the metal plate 400 or the metal plate 410 in each region. Here, the inner side refers to the central axis 490 side from the outer edges 422, 423, and 424.
The second region 414 is curved so that the third region 416 is disposed above the first region 412, and the line 421 that is the boundary between the third region 416 and the fifth region 420 is bent, and the fifth region 420 is The first region 412 and the third region 416 are arranged in the vertical direction. Thereby, the restriction part 70 can be provided in the bearing part 30. The restricting portion 70 formed by bending the line 421 constitutes a surface that is substantially parallel to the outer edge 422 and located on the inner side of the outer edge 422. The rotation direction of the shaft portion 42 is restricted by the shaft portion 42 rotating inside the bearing portion 30 coming into contact with the surface. In the present embodiment, the distance between the first region 412 and the third region 416 when the bearing portion 30 is configured and the height of the restricting portion 70 are substantially equal. The height of the restricting portion 70 here refers to the distance from the line 421 to the edge of the fifth region 420 facing the line 421 in the bearing portion 30.

In the metal plate 400 shown in FIG. 12, the fifth region 420 is provided adjacent to the third region 416, but as a modification of this aspect, as shown in FIG. 14, adjacent to the first region 412. The bearing unit 30 can also be configured using a metal plate 410 including the fifth region 420.
In the metal plate 410, the line 421 is provided between the first region 412 and the fifth region 420. The restriction portion 70 is configured by bending the line 421 upward with the first region 412 on the lower side and raising the fifth region 420 (see FIG. 15B).

In order to provide the restricting portion 70 inside the bearing portion 30, the line 421 that is the boundary between the first region 412 or the third region 416 and the fifth region 420 is disposed inside the outer edge 422 (FIG. 12). FIG. 14). Therefore, in the bearing portion 30, the outer periphery of the top plate portion 121 (see FIG. 13A) on which the restricting portion 70 stands or the outer periphery of the base end portion 120 (see FIG. 15A) is discontinuous in the vicinity of the line 421. There are various steps.
Here, in the modified example, when the discontinuous step is provided on the outer periphery of the base end portion 120, the base end portion 120 is embedded in the artificial gingival portion 704, so that the step substantially becomes the artificial gingival portion 704. It is not necessary to expose it on the surface side. Therefore, in a modification, the mechanical weakness of the bearing part 30 by having the said level | step difference can be excluded substantially.

As shown in FIG. 12, the first region 412 of the present embodiment has a bent portion 438 that can be folded in a direction intersecting the surface direction of the first region 412. As shown in FIGS. 13A and 13B, the base end of the bent portion 438 is bent in the bearing portion 30, and is embedded upright in the depth direction of the artificial gingival portion 704.
Here, the base end of the bent portion 438 is the edge of the bent portion 438 on the first region 412 side. Here, the surface direction means a direction in which the surface extends. For example, the surface direction is a direction perpendicular to the normal direction of the surface.

  When the top plate part 121 is set upward with respect to the base end part 120, the bent part 438 is positioned below the base end part 120, and therefore can be embedded in the artificial gingival part 704. Since the bent portion 438 is embedded in the artificial gingival portion 704, the arrangement of the bearing portion 30 with respect to the artificial gingival portion 704 is stabilized, and the dropout is prevented. The bent portion 438 can be provided in place of the anchor 170 described in the first embodiment or together with the anchor 170.

  The bent portion 438 in the present embodiment is provided adjacent to the outer edge of the base end portion 120. Thereby, formation of the metal plate 400 is easy and it is easy to bend so that the bending part 438 inclines below with respect to the base end part 120. FIG. However, the form of the bent portion 438 is not limited to this, and for example, a U-shaped cut is created in an arbitrary region within the surface of the base end portion 120, and the U-shaped portion is bent downward. Thus, the bent portion 438 can be provided in the plane of the base end portion 120 (not shown).

The bearing portion 30 of the present embodiment has a back surface portion 125 that faces the side peripheral portion 80. As shown in FIG. 12, the metal plate 400 is provided with a fourth region 418 constituting the back surface portion 125.
The fourth region 418 in the present embodiment is indirectly adjacent to the third region 416 through the fifth region 420 that constitutes the restricting portion 70. By arranging the third region 416 above the first region 412, bending the fifth region 420 in a predetermined direction, and then arranging the fourth region 418 along the outer periphery behind the base end portion 120. The back portion 125 is configured.
The back surface portion 125 includes, for example, a first back surface portion 125a located at the rear center of the base end portion 120 and a second flat plate surface portion 125b located on the opposite side of the restricting portion 70 with the first back surface portion 125a as the center. Correspondingly, the fourth region 418 in the metal plate 400 has a fourth region A 418a constituting the first back surface portion 125a and a fourth region B 418b constituting the second flat plate surface portion 125. The upper end and / or the lower end of the back surface portion 125 arranged as described above may be welded to the base end portion 120 and / or the top plate portion 121 to fix the arrangement position.
13A shows an example in which both the first back surface portion 125a and the second flat plate surface portion 125b are curved along the outer periphery on the rear side of the base end portion 120. However, the arrangement of the back surface portion 125 is not limited to this. It is not limited to. Although not shown, the back surface portion 125 may not be completely along the outer periphery on the rear side of the base end portion 120. For example, the first back surface portion 125a is substantially parallel to the width direction orthogonal to the opening direction of the access opening 31. May be arranged.

In the present embodiment, one region of any two regions of the first region 412 to the fourth region 418 that are not adjacent to each other in the metal plate 400 and adjacent to each other in the bearing portion 30 is in the other region of the two regions. An overlapping portion 432 that overlaps is provided. The overlapping portion 432 and the other region are welded to fix their positions.
By having the overlapping portion 432, the bearing portion 30 made of one metal plate 400 can be configured as one loop as shown in FIG. Specifically, in the bearing portion 30 shown in FIG. 13, the base end portion 120, the side peripheral portion 80, the top plate portion 121, the regulating portion 70, and the back surface portion 125 are continuously formed of a metal material that forms the metal plate 400. ing. And the overlapping part 432 provided in the back surface part 125 (fourth area | region 418) is accumulated on the upper surface of the protrusion end 430 which protrudes further back from the back of the 1st area | region 412, and in this state, the overlapping part 432 and protrusion end 430 are welded together. This completes the above loop. As shown in FIG. 13B, the normal direction of the welded portion 433 where the overlapping portion 432 and the protruding end 430 of the present embodiment are welded is substantially parallel to the normal direction of the base end portion 120. When the artificial gingival portion 704 is contacted or embedded, the welded portion 433 can be similarly contacted or embedded in the artificial gingival portion 704, and the placement stability of the bearing portion 30 with respect to the artificial gingival portion 704 is improved. Can do.

  As a modified example of the overlapping portion 432, an example can be given in which the overlapping portion 432 is provided at the front end of the third region 416 constituting the top plate portion 121 as shown in FIG. As shown in each drawing of FIG. 15, the overlapping portion 432 of the modified example overlaps the upper portion of the back surface portion 125 (first back surface portion 125 a) facing the top plate portion 121, and the back surface portion 125 (first back surface portion 125a) is welded and fixed. Even if the overlap with the overlapping portion 432 is not planned, it is preferable to provide the protruding end 430 continuously to the base end portion 120 as shown in FIGS. 14 and 15. This is because the protruding end 430 can be brought into contact with or embedded in the artificial gingival portion 704 to improve the placement stability of the bearing portion 30 with respect to the artificial gingival portion 704.

As shown in FIGS. 12 and 13 (a) and 13 (c), the bearing portion 30 or the metal plate 400 constituting the bearing portion 30 has a pair of side peripheral portions 80 that protrude and curve in the direction in which the entrance / exit opening 31 opens, and a pair of It has an entrance / exit opening 31 provided between the side peripheral portions 80.
A projecting piece 436 extending from the first region 412 in the same direction as the extending direction of the second region 414 is provided between the second regions 414 forming the pair of side peripheral portions 80 in the metal plate 400. . And the notch part 480 which makes the said direction the depth direction is provided in the both sides of the protrusion piece part 436. FIG.

  By providing the projecting piece portion 436, the support portion 90 that passes through the access opening 31 is supported directly or indirectly by the projecting piece portion 436. Since the notch portions 480 are provided at both ends of the projecting piece portion 436, the projecting piece portion 436 is not hung by the curvature of the side peripheral portion 80 that is curved between the base end portion 120 and the top plate portion 121. It can extend in substantially the same direction as the end 120. Therefore, the support part 90 supported by the protruding piece part 436 can be directed in the same direction as the extending direction of the surface of the base end part 120, and the placement stability of the support part 90 is good.

<Fifth embodiment>
Next, the partial denture manufacturing kit of the present invention (hereinafter also simply referred to as the kit of the present invention) will be described. Description of the kit of this invention is demonstrated using the example of the kit which manufactures the partial denture 100. FIG.
The partial denture manufacturing kit of the present invention is used for manufacturing the partial denture 100.
The kit of the present invention has a shape corresponding to the shaft body 40 or the shaft body 40, and corresponds to the shaft body manufacturing mold (not shown) for manufacturing the shaft body 40, and the bearing portion 30 or the bearing portion 30. And a bearing part manufacturing die (not shown) for manufacturing the bearing part 30.
The shaft main body 40 includes a shaft portion 42 and a support portion 90 extending from the shaft portion 42 in a direction different from the axial direction of the shaft portion 42. The bearing portion 30 is provided with an entrance / exit opening 31 through which the shaft portion 42 can enter and exit while being capable of supporting the shaft portion 42.
By providing the kit of the present invention, the partial denture 100 can be easily manufactured.

The shaft body manufacturing mold includes a member for forming a molding frame for molding the shaft body 40 by casting molding, injection molding, or the like, or a mold body serving as a base for molding the member. The shaft body manufacturing mold is “a shape corresponding to the shaft body 40” when the shaft body manufacturing mold is substantially the same shape as the shaft body 40 and substantially the same as the shaft body 40. The case where it has the site | part which is the same shape and an additional site | part is included is included. The additional portion includes a portion added according to a manufacturing requirement, and examples thereof include, but are not limited to, a portion corresponding to a so-called sprue, runner, gate, etc. known in injection molding.
In addition, the “bearing part manufacturing mold” and the “anchor manufacturing mold” according to the present invention have the same meaning as the above description and the “corresponding shape”.

  As the shaft main body 40 included in the kit of the present invention, the shaft main body 40 described above is appropriately used, and the description relating to the shaft main body 40 in the first to third embodiments described above is appropriately employed.

The support part 90 in the shaft main body 40 protrudes from the peripheral surface of the support part 90, and the embedded part 160 to be embedded in the artificial gingival part 704 of the first denture base 10 or the second denture base 20 on which the shaft main body 40 is provided. A mode in which two or more are provided at different positions in the extending direction of the support portion 90 is included.
By embedding the embedded portion 160 in the artificial gingival portion 704, the shaft body 40 can be made difficult to be pulled out from the artificial gingival portion 704.
In addition, the person who manufactures the partial denture 100 also adjusts the length of the shaft body 40 after cutting a part of the support portion 90 together with some of the embedded portions 154 according to the shape and state of the patient's mouth. One or a plurality of embedded portions 160 may be left.

The shaft body manufacturing mold body included in the kit of the present invention is a mold body for manufacturing the shaft body 40. For example, the shaft body 40 includes a shaft portion 42 and a support portion 90 extending from the shaft portion 42 in a direction different from the axial direction of the shaft portion 42. The support portion 90 includes a sandwiching portion 92 that protrudes from an end region near the shaft portion 42 and extends substantially parallel to the axial direction of the shaft portion 42, and a pitch 94 between the sandwiching portion 92 and the shaft portion 42 is determined by the sandwiching portion 92. Or less of the outer diameter.
For the shape of the shaft body manufacturing mold, the description of the shaft body 40 described above is appropriately referred to.

  The bearing portion 30 described above is appropriately used as the bearing portion 30 included in the kit of the present invention, and the description related to the bearing portion 30 in the first to third embodiments described above is appropriately referred to.

  The bearing part manufacturing mold body included in the kit of the present invention is a mold body for manufacturing the bearing part 30. For the shape of the bearing part manufacturing mold, the description of the bearing part 30 described above is appropriately referred to.

The kit of the present invention may further include an anchor 170 or an anchor manufacturing mold.
The anchor 170 is the same as that used in the first embodiment. For example, the anchor 170 protrudes in one direction from the proximal end portion 120 and the proximal end portion 120, is located on the distal end side from the bend portion 136 and the bend portion 136, and has an outer diameter larger than the outer diameter of the bend portion 136. And a protruding portion 132 having a bulging portion 134 (see FIG. 7A).
The anchor manufacturing mold is a mold for manufacturing the anchor 170, and the description of the anchor 170 described above is appropriately referred to for the shape of the anchor manufacturing mold.

The kit of the present invention may further include a wire.
The wires form the pair of wires 130 described in the first embodiment. The wires may be, for example, the first wire 130a and the second wire 130b that constitute the wire 130 as shown in FIG. 7, and although the illustration is omitted, the first wire 130a and the second wire 130b can be formed. There may be a single wire.

  The members constituting the shaft body manufacturing mold body, bearing portion manufacturing mold body, or anchor manufacturing mold body included in the kit of the present invention and the method of use are not particularly limited. For example, the shaft body described in the first embodiment Reference can be made to the description of the production mold as appropriate.

The kit of the present invention may further include an auxiliary tool 174 shown in FIG. The auxiliary tool 174 is a member for determining the distance between the pair of wires 130 in the partial denture 100. For example, the auxiliary tool 174 includes a spacer portion 177 having a predetermined distance 175 between the opposing outer peripheries. The predetermined distance 175 is a dimension that is less than the outer diameter of the bulging portion 134 in the anchor 170 and is a dimension that corresponds to the distance between the pair of wires 130 in the partial denture 100.
The auxiliary tool 174 in the present embodiment is a substantially U-shaped member formed by bending a wire. The distance 175 between the end region 176 of the bent wire and the outer periphery of the end region 176 is less than the outer diameter of the bulging portion 134 of the anchor 170 that can be used together with the end region 176. The auxiliary tool 174 may have a U-shaped cross section and a predetermined length dimension (depth dimension) by combining or bending a plate-like body instead of a wire.
Other examples of the auxiliary tool 174 not shown include a rectangular parallelepiped having a predetermined width dimension. The predetermined width dimension means that the opposing outer peripheral surface has a dimension corresponding to the predetermined distance 175.

  Although the usage method of the auxiliary tool 174 is not specifically limited, For example, the following examples can be given. That is, the auxiliary tool 174 is first temporarily installed on the surface of the artificial gingival part 704 where the pair of wires 130 is scheduled to be provided, and the first wire 130a and the second wire 130b are brought into contact with the outer periphery thereof, and two The distance between the wires can be easily determined. The kit of the present invention can include one or more auxiliary tools 174. After the first wire 130a and the second wire 130b are installed on the artificial gingival portion 704, the auxiliary tool 174 may be removed as appropriate.

The first to fifth embodiments of the present invention have been described above. The present invention is not limited to the above-described embodiment, and includes various modifications and improvements as long as the object of the present invention is achieved.
For example, in any one of the first to fourth embodiments, a clasp may be provided in order to stably arrange the first denture base 10 or the second denture base 20 in the oral cavity. As the clasp, in addition to the annular clasp that is worn around the remaining teeth, a one-piece bar clasp used in contact with the inner surface (the lingual surface) of the remaining teeth may be used.
In addition, the kit of the present invention described in the fifth embodiment may include a single metal plate 400 in which the bearing portion 30 is developed as an alternative to the bearing portion 30. The metal plate 400 can assemble the bearing portion 30 by an easy operation such as a bending process and a welding process performed as necessary. Therefore, providing the metal plate 400 as an alternative to the bearing portion 30 is suitable as a kit for manufacturing the partial denture 100. Of course, the bearing portion 30 included in the kit of the present invention may be a bearing portion 30 made of a single metal plate 400.

  The various components of the first embodiment to the fifth embodiment of the present invention do not have to be individually independent, but a plurality of components are formed as one member, and one component is Allowed to be formed of multiple members, a certain component is a part of another component, a part of a certain component overlaps a part of another component, etc. To do. That is, in the said embodiment, although it illustrated that the 1st denture base 10 consists of one component and the 2nd denture base 20 consists of one or several components, this invention is not limited to this.

The above embodiment includes the following technical idea.
(1) A partial denture comprising a first denture base that is detachably attached to the alveolar ridge and a second denture base that is detachably attached to the first denture base. ,
The first denture base or the second denture base has a first holding portion provided at a location different from the bearing portion and the bearing portion, and does not have the bearing portion and the first holding portion. The denture base or the second denture base has a shaft body having a shaft portion pivotally supported by the bearing portion and a second holding portion corresponding to the first holding portion,
The bearing portion has an access opening for the shaft portion to enter and exit,
The second denture base is swingably mounted with respect to the first denture base by being inserted into the bearing portion through the access opening and pivotally supported, and the first holding The partial denture, wherein the swinging of the second denture base relative to the first denture base is restricted by holding the portion and the second holding portion together.
(2) The first denture base and the second denture base have a buccal gingival part located on the buccal side of the remaining teeth in the oral cavity,
The partial denture according to (1), wherein the bearing portion, the shaft body, the first holding portion, and the second holding portion are provided in the cheek-side gingival portion.
(3) a first axial direction that is an axial direction of the shaft portion that enters and exits the inside and outside of the bearing portion through the entrance / exit opening;
The above (1) or (2) is different from the second axial direction which is the axial direction of the shaft portion pivotally supported by the bearing portion so that the second denture base can swing relative to the first denture base. The partial denture as described.
(4) The bearing portion has a space that allows rotation to change an axial direction of the shaft portion inserted on the inner side,
The shaft portion inserted inside the entrance / exit opening is rotated in the space, whereby the axial direction of the shaft portion changes between the first axial direction and the second axial direction (3). ) Partial denture.
(5) The partial denture according to (3) or (4), wherein an end portion on at least one side of the shaft portion is hemispherical.
(6) The inner side of the bearing portion is provided with a regulating portion that regulates the rotation direction of the shaft portion by contacting the shaft portion rotating inside the bearing portion,
The regulating part is
When the shaft portion rotates in a predetermined direction, the shaft portion is allowed to transition from the first axis direction to the second axis direction, and also transitions from the second axis direction to the first axis direction. And that
When the shaft portion rotates in a direction opposite to the predetermined direction, the shaft portion is restricted from transitioning from the first axis direction to the second axis direction, and from the second axis direction to the first direction. The partial denture according to any one of (3) to (5), wherein the partial denture is allowed to transition in the axial direction.
(7) a first position where a center of the shaft portion, which is rotatably inserted into the inside of the bearing portion through the access opening, is located;
Any one of the above (3) to (6), which is different from the second position where the center of the shaft portion pivotally supported by the bearing portion is swingable with respect to the first denture base. The partial denture according to claim 1.
(8) The first denture base or the second denture base has an artificial gingival part,
The bearing portion has an undercut portion on the back surface,
The partial denture according to any one of (1) to (7), wherein the undercut portion is buried on the surface side of the artificial gingival portion.
(9) The first holding part and the second holding part have a fitting structure that is detachably engaged in a swinging direction of the second denture base that swings with respect to the first denture base ( The partial denture according to any one of 1) to (8).
(10) The first holding portion has a pair of wires erected on a peripheral surface of the first denture base or the second denture base,
The second holding part has a protruding part protruding from the peripheral surface of the first denture base or the second denture base not having the first holding part,
A bulging portion having an outer diameter larger than the distance between the pair of wires and a proximal end side of the bulging portion and smaller than the outer diameter of the bulging portion at the distal end portion of the protruding portion The partial denture as set forth in (9) above, which has a bent portion having an outer diameter.
(11) The ends of the first wire and the second wire constituting the pair of wires are slidable in the pulling direction on the artificial gingiva provided on the first denture base or the second denture base. The partial denture as described in (10) above.
(12) The length according to (10) or (11), wherein a length of the pair of wires exposed on a peripheral surface of the first denture base or the second denture base exceeds an outer diameter of the bulge portion. Denture.
(13) In any one of (1) to (8), the first holding unit and the second holding unit each have a suction surface provided with a magnet or a magnetic body that magnetically attract each other. The partial denture as described.
(14) The bearing portion includes a side peripheral portion that supports the shaft portion so that the shaft is rotatable.
The shaft main body includes the shaft portion and a support portion extending from the shaft portion in a direction different from the axial direction of the shaft portion,
The support portion has a sandwiching portion that protrudes from an end region near the shaft portion and extends substantially parallel to the axial direction of the shaft portion,
The partial denture according to any one of (1) to (13), wherein a pitch between the sandwiching portion and the shaft portion is substantially equal to a thickness of the side peripheral portion.
(15) From the above (1) to (14), the first denture base or the second denture base provided with the bearing portion has a sheath portion that accommodates a predetermined portion of the shaft body exposed from the artificial gingival portion. ) Partial denture according to any one of the above.
(16) The bearing portion is composed of a single metal plate, a proximal end portion that is in contact with or embedded in an artificial gingival portion provided in the first denture base or the second denture base, and the shaft A side peripheral portion that rotatably supports the portion, and the metal plate includes a first region that constitutes the base end portion, and a second region that constitutes the side peripheral portion. The partial denture according to any one of (1) to (15).
(17) The bearing portion has a top plate portion facing the base end portion, and the metal plate has a third region constituting the top plate portion,
In the metal plate, the partial denture according to (16), wherein the first region and the third region are adjacent to each other through the second region.
(18) The bearing portion includes a top plate portion that faces the base end portion and a regulating portion that regulates a rotation direction of the shaft portion by contacting the shaft portion rotating inside the bearing portion. Provided, and the metal plate has a third region constituting the top plate portion,
The region constituting the restricting portion is provided adjacent to the first region or the third region in the metal plate, and the restricting portion is inside the outer edge of the base end portion in the bearing portion. The partial denture according to (16) or (17), wherein the partial denture is bent and arranged in a direction across the base end portion and the top plate portion.
(19) The first region has a bent portion that can be folded in a direction intersecting the surface direction of the first region,
The part according to any one of (16) to (18), wherein a base end of the bent portion is bent in the bearing portion, and is embedded upright in a depth direction of the artificial gingival portion. Denture.
(20) The bearing portion has a back surface portion facing the side peripheral portion, and the metal plate has a fourth region constituting the back surface portion,
One of the two regions from the first region to the fourth region that is not adjacent to the metal plate and adjacent to the bearing portion has an overlapping portion that overlaps the other region of the two regions. Has
The partial denture according to any one of (17) and (18), wherein the overlapping portion and the other region are welded.
(21) The bearing portion includes a pair of side peripheral portions that protrude and curve in a direction in which the access opening is opened, and the access opening that is provided between the pair of side peripheral portions,
A protruding piece extending from the first region in the same direction as the extending direction of the second region is provided between the second regions forming the pair of side peripheral portions in the metal plate. The partial denture according to any one of (16) to (20), wherein a notch portion having a depth direction is provided on both sides of the protruding piece portion.
(22) A partial denture manufacturing kit for manufacturing the partial denture according to any one of (1) to (21),
A shaft body comprising a shaft portion and a support portion extending from the shaft portion in a direction different from the axial direction of the shaft portion, or a shape corresponding to the shaft body, and manufacturing a shaft body for manufacturing the shaft body Molds, and
A bearing part capable of pivoting the shaft part and having an entrance opening for the shaft part to go in and out, or a shape corresponding to the bearing part, and a bearing part manufacturing mold for manufacturing the bearing part;
A partial denture manufacturing kit comprising:
(23) The support portion may be an extension portion of the support portion that is to be embedded in an artificial gingival portion of the first denture base or the second denture base that protrudes from the peripheral surface of the support portion and is provided with the shaft body. The partial denture manufacturing kit according to the above (22), in which two or more are provided at different positions in the present direction.
(24) A base end portion and a bulging portion that protrudes in one direction from the base end portion, is located on the distal end side of the bend portion and the bend portion, and has an outer diameter larger than the outer diameter of the bend portion. The partial denture manufacturing kit according to (22) or (23), further comprising: an anchor having a protrusion or an anchor manufacturing mold for manufacturing the anchor that has a shape corresponding to the anchor.
(25) The partial denture manufacturing kit according to any one of (22) to (24), further including a single metal plate that can configure the bearing portion as an alternative to the bearing portion.
(26) A shaft body used for the partial denture according to any one of (1) to (21),
A shaft portion, and a support portion extending from the shaft portion in a direction different from the axial direction of the shaft portion,
The support portion has a sandwiching portion that protrudes from an end region near the shaft portion and extends substantially parallel to the axial direction of the shaft portion,
The shaft main body characterized in that a pitch between the clamping portion and the shaft portion is equal to or less than an outer diameter of the clamping portion.
(27) The support portion is provided with two or more embedded portions that protrude from the peripheral surface of the support portion and are planned to be embedded in the artificial gingival portion at different positions in the extending direction of the support portion. The shaft body described in 1.
(28) A shaft body manufacturing mold for manufacturing a shaft body used in the partial denture according to any one of (1) to (21),
A shaft body manufacturing mold, which has a shape corresponding to the shaft body,
However, the shaft body is
A shaft portion, and a support portion extending from the shaft portion in a direction different from the axial direction of the shaft portion,
The support portion has a sandwiching portion that protrudes from an end region near the shaft portion and extends substantially parallel to the axial direction of the shaft portion,
The pitch between the clamping part and the shaft part is equal to or smaller than the outer diameter of the clamping part.

DESCRIPTION OF SYMBOLS 10 ... 1st denture base 20 ... 2nd denture base 30 ... Bearing part 31 ... Entrance / exit opening 32 ... Inner peripheral surface 40 ... Shaft body 42 ... Shaft part 42a ...・ Cut surface end part 42 b ... hemispherical end part 50 ... first holding part 60 ... second holding part 70 ... regulating part 80 ... side peripheral part 90 ... support part 92 ... -Holding part 94 ... Pitch 100 ... Partial denture 110 ... First axial direction 112 ... In / out direction 114 ... Second axial direction 116 ... Space 117 ... Turning direction 118 ... Moving direction 119 ... Oscillating direction 120 ... Base end part 121 ... Top plate part 122 ... Undercut part 124 ... Side face 125 ... Back face part 125a ... First Back portion 125b ... second back portion 126 ... first opening 128 ... second opening 130 ... wire 130a ... first Ear 130b ... second wire 132 ... projection 134 ... bulge 136 ... bending 142 ... first magnet 144 ... first attracting surface 146 ... second magnet 148 ... second suction surface 150 ... sheath 152 ... opening 154 ... buried part 156 ... groove outer periphery 158 ... groove inner periphery 160 ... buried part 170 ... anchor 174 ... Auxiliary tool 175 ... Distance 176 ... End region 177 ... Spacer part 200 ... Partial dentures 300 ... Partial dentures 400, 410 ... Metal plate 412 ... No. One area 414 ... second area 415 ... opening 416 ... third area 418 ... fourth area 418a ... fourth area A
418b ... fourth region B
420 ... Fifth region 421 ... Lines 422, 423, 424 ... Outer edge 430 ... Projection end 432 ... Overlapping part 433 ... Welding part 436 ... Projection piece part 438 ... Bent part 480 ... notch part 490 ... central axis 700 ... jaw model 701 ... alveolar ridge 702 ... residual tooth 703 ... gum 704 ... artificial gingival part 704a ... main Surface 704b ... concave portion 706 ... buccal gingival portion 707 ... lingual gingival portion 708 ... artificial tooth 710 ... gingival boundary engaging portion A ... center A1 ... first position A2 ... Second position

Claims (24)

A partial denture comprising a first denture base that is detachably attached to the alveolar ridge, and a second denture base that is detachably attached to the first denture base,
The first denture base or the second denture base has a first holding portion provided at a location different from the bearing portion and the bearing portion, and does not have the bearing portion and the first holding portion. The denture base or the second denture base includes a shaft body having a shaft portion that is detachably attached to the bearing portion and is pivotally supported, and a second holding portion corresponding to the first holding portion,
The bearing portion has an access opening for the shaft portion to enter and exit,
The second denture base is swingably mounted with respect to the first denture base by being inserted into the bearing portion through the access opening and pivotally supported, and the first holding By holding the part and the second holding part together, the swinging of the second denture base relative to the first denture base is regulated ,
A first axial direction that is an axial direction of the shaft portion that enters and exits the inside and outside of the bearing portion through the entrance / exit opening;
A partial denture that is different from a second axial direction that is an axial direction of the shaft portion that is pivotally supported by the bearing portion so that the second denture base can swing relative to the first denture base. The bearing portion has a space that allows rotation to change the axial direction of the shaft portion inserted inside, and
The and out the shaft portion which the inserted inside the opening is, claim axial direction of the shaft portion by being rotated in said space, a transition to said second axial direction as the first axial direction 1 The partial denture as described in 1. The partial denture according to claim 1 or 2 , wherein at least one end portion of the shaft portion is hemispherical. On the inner side of the bearing portion, there is provided a restricting portion for restricting the rotation direction of the shaft portion by contacting the shaft portion rotating on the inner side,
The regulating part is
When the shaft portion rotates in a predetermined direction, the shaft portion is allowed to transition from the first axis direction to the second axis direction, and also transitions from the second axis direction to the first axis direction. And that
When the shaft portion rotates in a direction opposite to the predetermined direction, the shaft portion is restricted from transitioning from the first axis direction to the second axis direction, and from the second axis direction to the first direction. The partial denture according to any one of claims 1 to 3 , wherein the partial denture is allowed to transition in an axial direction. A first position where the center of the shaft portion, which is rotatably inserted into the inside of the bearing portion through the access opening, is located;
Second position and, is any one of the different claims 1 to 4, the center of the shaft portion which the second denture to said first denture is pivotally supported by the bearing portion swingably located The partial denture as described in 1. Wherein the first holding portion and the second holding portion, the said swinging direction of the second denture to first denture rocking contrast, claims 1-5 forming a fitting structure that engages removably The partial denture according to any one of the above. The partial denture according to any one of claims 1 to 5 , wherein each of the first holding part and the second holding part has an adsorption surface provided with a magnet or a magnetic body that magnetically adsorb each other.   A partial denture comprising a first denture base that is detachably attached to the alveolar ridge, and a second denture base that is detachably attached to the first denture base,
  The first denture base or the second denture base has a first holding portion provided at a location different from the bearing portion and the bearing portion, and does not have the bearing portion and the first holding portion. The denture base or the second denture base includes a shaft body having a shaft portion that is detachably attached to the bearing portion and is pivotally supported, and a second holding portion corresponding to the first holding portion,
  The bearing portion has an access opening for the shaft portion to enter and exit,
  The second denture base is swingably mounted with respect to the first denture base by being inserted into the bearing portion through the access opening and pivotally supported, and the first holding By holding the part and the second holding part with each other, swinging of the second denture base with respect to the first denture base is regulated,
  The first holding part and the second holding part have a fitting structure that is detachably engaged in the swinging direction of the second denture base that swings with respect to the first denture base,
  The first holding portion has a pair of wires erected on the peripheral surface of the first denture base or the second denture base,
  The second holding part has a protruding part protruding from the peripheral surface of the first denture base or the second denture base not having the first holding part,
  A bulging portion having an outer diameter larger than the distance between the pair of wires and a proximal end side of the bulging portion and smaller than the outer diameter of the bulging portion at the distal end portion of the protruding portion A partial denture having a torsional portion having an outer diameter. The ends of the first wire and the second wire constituting the pair of wires are slidably installed in the pulling direction on the artificial gingiva provided on the first denture base or the second denture base. The partial denture according to claim 8 . The partial denture according to claim 8 or 9 , wherein a length of the pair of wires exposed on a peripheral surface of the first denture base or the second denture base exceeds an outer diameter of the bulging portion. A partial denture comprising a first denture base that is detachably attached to the alveolar ridge, and a second denture base that is detachably attached to the first denture base,
The first denture base or the second denture base has a first holding portion provided at a location different from the bearing portion and the bearing portion, and does not have the bearing portion and the first holding portion. The denture base or the second denture base includes a shaft body having a shaft portion that is detachably attached to the bearing portion and is pivotally supported, and a second holding portion corresponding to the first holding portion,
The bearing portion has an access opening for the shaft portion to enter and exit,
The second denture base is swingably mounted with respect to the first denture base by being inserted into the bearing portion through the access opening and pivotally supported, and the first holding By holding the part and the second holding part together, the swinging of the second denture base relative to the first denture base is regulated,
The bearing portion has a side peripheral portion that supports the shaft portion so that the shaft can rotate.
The shaft main body includes the shaft portion and a support portion extending from the shaft portion in a direction different from the axial direction of the shaft portion,
The support portion has a sandwiching portion that protrudes from an end region near the shaft portion and extends substantially parallel to the axial direction of the shaft portion,
A partial denture whose pitch between the sandwiching portion and the shaft portion is substantially equal to the thickness of the side peripheral portion .   The said 1st holding | maintenance part and said 2nd holding | maintenance part make | form the fitting structure which detachably engages in the rocking | fluctuation direction of the said 2nd denture base rock | fluctuated with respect to the said 1st denture base. Partial denture.   The partial denture according to claim 11, wherein the first holding part and the second holding part each have an attracting surface provided with a magnet or a magnetic body that attracts each other magnetically. The bearing portion is composed of a single metal plate, and a base end portion that is in contact with or embedded in an artificial gingival portion provided in the first denture base or the second denture base, and the shaft portion is a shaft. The side periphery which supports rotatably, The said metal plate has the 1st area | region which comprises the said base end part, and the 2nd area | region which comprises the said side periphery. The partial denture according to any one of 13 above. A partial denture comprising a first denture base that is detachably attached to the alveolar ridge, and a second denture base that is detachably attached to the first denture base,
The first denture base or the second denture base has a first holding portion provided at a location different from the bearing portion and the bearing portion, and does not have the bearing portion and the first holding portion. The denture base or the second denture base includes a shaft body having a shaft portion that is detachably attached to the bearing portion and is pivotally supported, and a second holding portion corresponding to the first holding portion,
The bearing portion has an access opening for the shaft portion to enter and exit,
The second denture base is swingably mounted with respect to the first denture base by being inserted into the bearing portion through the access opening and pivotally supported, and the first holding By holding the part and the second holding part together, the swinging of the second denture base relative to the first denture base is regulated,
The bearing portion is composed of a single metal plate, and a base end portion that is in contact with or embedded in an artificial gingival portion provided in the first denture base or the second denture base, and the shaft portion is a shaft. A side periphery that rotatably supports, and
The metal plate has a first region constituting the base end portion and a second region constituting the side peripheral portion,
The bearing portion has a top plate portion facing the base end portion, and the metal plate has a third region constituting the top plate portion,
In the metal plate, the partial denture in which the first region and the third region are adjacent to each other through the second region . A partial denture comprising a first denture base that is detachably attached to the alveolar ridge, and a second denture base that is detachably attached to the first denture base,
The first denture base or the second denture base has a first holding portion provided at a location different from the bearing portion and the bearing portion, and does not have the bearing portion and the first holding portion. The denture base or the second denture base includes a shaft body having a shaft portion that is detachably attached to the bearing portion and is pivotally supported, and a second holding portion corresponding to the first holding portion,
The bearing portion has an access opening for the shaft portion to enter and exit,
The second denture base is swingably mounted with respect to the first denture base by being inserted into the bearing portion through the access opening and pivotally supported, and the first holding By holding the part and the second holding part together, the swinging of the second denture base relative to the first denture base is regulated,
The bearing portion is composed of a single metal plate, and a base end portion that is in contact with or embedded in an artificial gingival portion provided in the first denture base or the second denture base, and the shaft portion is a shaft. A side periphery that rotatably supports, and
The metal plate has a first region constituting the base end portion and a second region constituting the side peripheral portion,
The bearing portion includes a top plate portion facing the base end portion, and a regulating portion that regulates a rotation direction of the shaft portion by contacting the shaft portion rotating inside the bearing portion. And the metal plate has a third region constituting the top plate part,
The region constituting the restricting portion is provided adjacent to the first region or the third region in the metal plate, and the restricting portion is inside the outer edge of the base end portion in the bearing portion. A partial denture that is bent and arranged in a direction across the base end and the top plate . The bearing portion has a back surface portion opposed to the side peripheral portion, and the metal plate has a fourth region constituting the back surface portion,
At one region of any two areas of the fourth region from the first region adjacent the said bearing part as well as non-adjacent in the metal plate, overlapping portion that overlaps the other region of the two regions With
The partial denture according to claim 15 or 16 , wherein the overlapping portion and the other region are welded.   A partial denture comprising a first denture base that is detachably attached to the alveolar ridge, and a second denture base that is detachably attached to the first denture base,
  The first denture base or the second denture base has a first holding portion provided at a location different from the bearing portion and the bearing portion, and does not have the bearing portion and the first holding portion. The denture base or the second denture base includes a shaft body having a shaft portion that is detachably attached to the bearing portion and is pivotally supported, and a second holding portion corresponding to the first holding portion,
  The bearing portion has an access opening for the shaft portion to enter and exit,
  The second denture base is swingably mounted with respect to the first denture base by being inserted into the bearing portion through the access opening and pivotally supported, and the first holding By holding the part and the second holding part with each other, swinging of the second denture base with respect to the first denture base is regulated,
  The bearing portion is composed of a single metal plate, and a base end portion that is in contact with or embedded in an artificial gingival portion provided in the first denture base or the second denture base, and the shaft portion is a shaft. A side periphery that rotatably supports, and
  The metal plate has a first region constituting the base end portion and a second region constituting the side peripheral portion,
  The first region has a foldable portion that can be folded in a direction intersecting the surface direction of the first region,
  A partial denture in which the proximal end of the bent portion is bent and embedded in the bearing portion in the depth direction of the artificial gingival portion. A partial denture comprising a first denture base that is detachably attached to the alveolar ridge, and a second denture base that is detachably attached to the first denture base,
The first denture base or the second denture base has a first holding portion provided at a location different from the bearing portion and the bearing portion, and does not have the bearing portion and the first holding portion. The denture base or the second denture base includes a shaft body having a shaft portion that is detachably attached to the bearing portion and is pivotally supported, and a second holding portion corresponding to the first holding portion,
The bearing portion has an access opening for the shaft portion to enter and exit,
The second denture base is swingably mounted with respect to the first denture base by being inserted into the bearing portion through the access opening and pivotally supported, and the first holding By holding the part and the second holding part together, the swinging of the second denture base relative to the first denture base is regulated,
The bearing portion is composed of a single metal plate, and a base end portion that is in contact with or embedded in an artificial gingival portion provided in the first denture base or the second denture base, and the shaft portion is a shaft. A side periphery that rotatably supports, and
The metal plate has a first region constituting the base end portion and a second region constituting the side peripheral portion,
The bearing portion has a pair of side peripheral portions that protrude and curve in the direction in which the access opening opens, and the access opening provided between the pair of side peripheral portions,
A protruding piece extending from the first region in the same direction as the extending direction of the second region is provided between the second regions forming the pair of side peripheral portions in the metal plate. The partial denture in which the notch part made into a depth direction is provided in the both sides of the said protrusion piece part.   The first holding portion and the second holding portion form a fitting structure that is detachably engaged in a swinging direction of the second denture base that swings with respect to the first denture base. The partial denture according to any one of the above.   The partial denture according to any one of claims 15 to 19, wherein each of the first holding part and the second holding part has a suction surface provided with a magnet or a magnetic body that magnetically attract each other. The first denture base and the second denture base have a buccal gingival part located on the buccal side of the remaining teeth in the oral cavity,
The partial denture according to any one of claims 1 to 21, wherein the bearing portion, the shaft body, the first holding portion, and the second holding portion are provided in the cheek-side gingival portion. The first denture base or the second denture base has an artificial gingival part,
The bearing portion has an undercut portion on the back surface,
The partial denture according to any one of claims 1 to 22 , wherein the undercut part is buried on the surface side of the artificial gingival part. The first denture or the second denture said bearing portion is provided, any one of claims 1 to 23 having a sheath for accommodating a predetermined part of the shaft body which is exposed from the artificial gingival The partial denture as described in 1.

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