JP6494394B2 - Articulator - Google Patents

Description

  The present invention relates to an occlusion used for confirming and adjusting the occlusal state of an upper dentition model and a lower dentition model used when manufacturing a prosthesis or a denture of an upper and / or lower jaw of a dental medical patient. Related to the vessel.

  Conventionally, an articulator described in Patent Document 1 is known. In this articulator, the lower jaw model support base on which the lower jaw dentition model is set and the upper jaw model support base on which the upper dentition model is set have a structure that can move in four directions, left and right, front and rear. Each of the model support base and the maxillary model support base is supported by a ball body and can be tilted with respect to all directions. According to the articulator having such a structure, the lower jaw dentition model set on the lower jaw model support base together with the lower jaw model support base can be moved in the four directions of left and right, front and rear, and the inclination thereof can be variously changed. It is possible to move the maxillary dentition model set on the maxillary model support base together with the maxillary model support base in four directions, left and right, front and back, and to change its inclination in various ways. The row model and the maxillary dentition model can be easily and reliably adjusted to the position of normal occlusion.

Japanese Unexamined Patent Publication No. 7-95990

  By the way, as shown in FIGS. 1A and 1B, the human maxilla Max in which the upper teeth Dmax are lined up is integrated with the skull S and does not move back and forth with respect to the skull S. It does not lean against it. On the other hand, the human mandible Man on which the lower teeth Dman are arranged is movably coupled to the skull S by the temporomandibular joint TMJ (left temporomandibular joint TMJL, right temporomandibular joint TMJR). The temporomandibular joint TMJ (TMJL, TMLR) includes a mandibular cave MF (left mandibular cave MFL, right mandibular cave MFR) formed on the skull S side, and a mandible Man after the mandible Man as shown in FIG. 2 together with FIGS. It is composed of a mandibular head MH (left mandibular head MHL, right mandibular head MHR) formed at the upper end, and the mandibular head MH (MHL, MHR) is loosely fitted in the mandibular cave MF (MFL, MFR). Man is attached to the skull S.

  When opening the mouth, as shown in FIG. 3 together with FIG. 1B, the mandibular head MH (left mandibular head MHL, right mandibular head MHR) of the mandible Man is the mandibular cave MF (left mandibular cave MHL, right mandibular cave MHR). ) While moving forward, the lower jaw Man moves away from the upper jaw Mmax with the lower head MH (left lower head MHL, right lower head MHR) as a fulcrum. On the other hand, when closing the mouth, the mandibular Man MH (left mandibular head MHL, right mandibular head MHL, right mandibular head MHL), with the mandible Man approaching the maxilla Mmax, with the mandibular head MH (left mandibular head MHL, right mandibular head MHR) as a fulcrum. The mandibular head MHR) moves to the back of the mandibular cave MF (left mandibular cave MHL, right mandibular cave MHR), and the lower teeth Dman of the mandible Man mesh with the upper teeth Dmax of the upper jaw Mmax.

  Further, when the lower jaw Man moves to the left side, the lower jaw Man moves with the left lower jaw head MHL fitted in the left lower jaw cave MFL as a fulcrum, as shown in FIG. 4, and the right lower jaw head MHR moves to the right lower jaw cave. The entire lower jaw Man moves to the left while moving forward in the MFR. On the other hand, when the mandible Man moves to the right, the mandible Man moves with the right mandibular head MHR fitted in the right mandibular cave MFR as a fulcrum, and the left mandibular head MHL moves forward in the left mandibular cave MFR. However, the entire lower jaw Man moves to the right (not shown).

  By the way, during the lateral movement of the lower jaw Man as described above, the lower jaw Man is guided while the canine teeth of the upper teeth Dmax and the canine teeth of the lower teeth Dman are in contact with each other, and the occlusal portion is separated. Such an occlusal mode is called canine guided occlusion, and it is said that it is one of the ideal occlusal modes because no lateral pressure is applied to the molar portion during lateral movement of the lower jaw Man.

  In the above-described conventional articulator (see Patent Document 1), the lower jaw dentition model set on the lower jaw model support base can be moved in four directions, left and right, front and rear, and its inclination can be changed variously. The maxillary dentition model set on the support for the maxillary model can be moved in four directions, left and right, front and back, and its inclination can be changed variously, but canine guided occlusion with respect to the fixed maxillary dentition model It is difficult to reproduce the movement of the lower dentition model that mimics the above. Therefore, whether or not the denture or prosthesis of the maxillary dentition model and the denture or prosthesis of the mandibular dentition model should be adjusted to be occluded in the canine guided occlusal mode, or occluded in the canine guided occlusal mode It is difficult to judge.

  The present invention has been made in view of such circumstances, and provides an articulator that can easily reproduce the movement of a lower jaw dentition model imitating a canine guided occlusion with respect to a set upper dentition model To do.

  The articulator according to the present invention is an articulator that sets the upper dentition model and the lower dentition model facing each other, and reproduces the occlusion state of the upper dentition model and the lower dentition model, An upper jaw mounting portion for mounting the upper jaw dentition model, and a lower jaw for supporting the lower jaw dentition model arranged to face the upper dentition model below the upper dentition model mounted on the upper jaw mounting portion A support structure, a first support shaft projecting laterally from one upper end of the lower jaw support structure, and having a ball at the tip; and the first support from the upper other end of the lower jaw support structure. A second support shaft portion that protrudes in a direction opposite to the shaft portion and includes a ball body at a tip; a first support block that slidably supports the ball body of the first support shaft portion obliquely forward and downward; and Second support for slidably supporting the ball body of the second support shaft portion diagonally forward and downward A lock, a third support shaft portion projecting forward from a front end portion of the lower jaw support structure, a front guide block for guiding the third support shaft portion in a diagonally horizontal direction, and the lower jaw support The structure includes an elastic support mechanism that elastically supports the lower jaw support structure so as to resist the movement of the structure.

  With such a configuration, the lower jaw support structure is supported by the first support block, and the upper support side of the lower jaw support structure, for example, the ball body of the first support shaft portion protruding from the upper right end; A state of being supported by the second support block and supported by the ball of the second support shaft portion protruding from the upper left end, which is the upper other side end of the lower jaw support structure, and elastically supported by the elastic mechanism It has become. Then, when the front end of the lower jaw support structure is pushed diagonally to the left, for example, with the upper jaw dentition model mounted on the upper jaw mounting portion and the lower jaw dentition model supported by the lower jaw support structure, The third support shaft portion that protrudes forward from the front end portion of the lower jaw support structure moves while being guided in a diagonally downward left direction by the front guide block. As the front end portion of the lower jaw support structure moves obliquely downward to the left, the ball body of the first support shaft portion slides forward and obliquely downward on the sliding surface in the first support block. The state where the ball body of the shaft portion is supported by the second support block without sliding forward and obliquely downward on the sliding surface is maintained. Accordingly, the lower jaw support structure rotates substantially diagonally downward to the left with the ball body of the second support shaft as a fulcrum while receiving an elastic action against the movement of the support structure by the elastic mechanism.

  On the other hand, when the front end portion of the lower jaw support structure is pushed obliquely downward to the right, for example, the third support shaft portion moves while being guided obliquely downward to the right by the front guide block. . As the front end portion of the lower jaw support structure moves diagonally downward to the right, the ball body of the second spindle portion slides diagonally forward and downward on the sliding surface in the second support block, and the first support The state in which the ball body of the shaft portion is supported by the first support block without sliding obliquely downward on the sliding surface is maintained. Therefore, the lower jaw support structure rotates substantially diagonally downward to the right with the ball body of the first support shaft portion as a fulcrum while receiving an elastic action against the movement of the lower jaw support structure by the elastic support mechanism.

  As described above, the lower jaw support structure that rotates substantially diagonally to the left with the ball body of the second support shaft portion as a fulcrum and substantially diagonally downward to the right with the ball body of the first support shaft portion as a fulcrum. The movement of the supported lower dentition model is a movement that gradually opens while moving to the left side and a movement that gradually opens while moving to the right side with respect to the upper dentition model mounted on the upper jaw mounting portion. Here, the ball body of the first support shaft portion and the first support block that supports the ball body are, for example, those imitating the right lower jaw MHR and the right lower jaw cave MFR in the lower jaw Man shown in FIGS. 1A to 4, The ball body of the two spindle parts and the second support block that supports the ball body can be regarded as imitating the left mandibular head MHL and the left mandibular cave MFL in the mandible Man.

  In the articulator according to the present invention, the lower jaw support structure includes a lower jaw mounting portion for mounting the lower jaw dentition model, and a suspension support for hanging and supporting the lower jaw mounting portion, and the first support. The shaft portion protrudes from one upper end of the suspension support, the second support shaft portion protrudes from the other upper end of the suspension support, and the third support shaft portion is the lower jaw mounting portion. It can be set as the structure which protrudes from the front-end part.

  With such a configuration, the lower jaw mounting portion on which the lower jaw dentition model is mounted and the suspension support body for hanging and supporting the lower jaw mounting portion are integrally supported slidably on the first support block. The ball body of the first support shaft portion and the ball body of the second support shaft portion slidably supported by the second support block. Then, for example, when the front end portion of the lower jaw mounting portion is pushed obliquely downward to the left, the third support shaft portion protruding forward from the front end portion of the lower jaw mounting portion is guided in the diagonally downward left direction by the front guide block. Move while. As the front end of the lower jaw mounting portion moves diagonally to the left, the lower jaw mounting portion and the suspension support are integrated to resist the movement of the lower jaw mounting portion and the suspension support by the elastic support mechanism. While being subjected to the elastic action, the ball body of the second support shaft portion is pivoted substantially diagonally downward to the left with the ball body as a fulcrum. Further, when the distal end portion of the lower jaw mounting portion is pushed obliquely downward to the right, for example, the third support shaft portion moves while being guided obliquely downward to the right by the front guide block. As the front end of the lower jaw mounting portion moves obliquely downward to the right, the lower jaw mounting portion and the suspension support are integrated to resist the movement of the lower jaw mounting portion and the suspension support by the elastic support mechanism. While receiving the elastic action, the ball body of the first support shaft portion is pivoted substantially diagonally downward to the right with the fulcrum as a fulcrum. A lower jaw mounting portion that rotates together with the suspension support body substantially diagonally to the left with the ball body of the second support shaft portion as a fulcrum, and substantially obliquely downward to the right with the ball body of the first support shaft portion as a fulcrum. The movement of the mounted lower dentition model is a movement that gradually opens while moving to the left side and a movement that gradually opens while moving to the right side with respect to the upper dentition model mounted on the upper jaw mounting portion.

  In the articulator according to the present invention, the elastic support mechanism includes an upper elastic support mechanism that elastically supports the upper portion of the suspension support body against the movement, and a lower portion of the suspension support body that resists the movement. Thus, the lower elastic support mechanism that elastically supports the structure can be used.

  With such a configuration, the suspension support body that suspends and supports the lower jaw mounting portion on which the lower jaw dentition model is mounted resists the movement of the suspension support body by the upper elastic support mechanism and the lower elastic support mechanism. So that it is elastically supported.

  In the articulator according to the present invention, the upper elastic support mechanism includes a plurality of springs extending rearward from the suspension support body between the first support shaft portion and the second support shaft portion. be able to.

  With such a configuration, the lower jaw mounting portion on which the lower jaw dentition model is mounted and the suspension support body as a whole are between the first support shaft portion and the second support shaft portion on the upper portion of the suspension support body. It is elastically supported by a plurality of acting spring forces.

  In the articulator according to the present invention, the lower elastic support mechanism may have a plurality of springs extending forward from the lower portion of the suspension support.

  With such a configuration, the lower jaw mounting portion on which the lower jaw dentition model is mounted and the suspension support are elastically supported by the force of the plurality of springs acting on the lower portion of the suspension support as a whole.

  In the articulator according to the present invention, an inter-spindle adjustment mechanism for adjusting a distance between the first support shaft part and the second support shaft part, and a distance between the first support block and the second support block. And an inter-block adjusting mechanism that adjusts the angle.

  With such a configuration, the interval between the first support shaft portion and the second support shaft portion can be adjusted according to the size of the lower jaw dentition model supported by the lower jaw support structure, and The distance between the first support block and the second support block can be adjusted so that the ball body of the first support shaft portion and the ball body of the second support shaft portion can be properly supported. .

  In the articulator according to the present invention, a first downward adjustment mechanism that adjusts an oblique downward direction of the first support block, and a second downward adjustment mechanism that adjusts an oblique downward direction of the second support block. It can be set as the structure which has.

  The oblique lower direction of each of the first support block and the second support block can be adjusted so as to more faithfully simulate the left lower cave and the right lower cave corresponding to the lower dentition model.

  In the articulator according to the present invention, the articulator may have a distribution angle adjustment mechanism that adjusts each distribution angle in the left-right diagonal direction of the third support shaft portion in the front guide block.

  With such a configuration, it is possible to adjust the left and right oblique distribution angles of the third support shaft portion by the front guide block, so that the left direction and the right with respect to the downward rotation of the lower jaw support structure The rate of rotation in the direction can be adjusted.

  According to the articulator according to the present invention, the articulator rotates approximately diagonally to the left with the ball body of the second support shaft portion as a fulcrum, and approximately diagonally downward to the right with the ball body of the first support shaft portion as a fulcrum. The movement of the lower dentition model supported by the lower jaw support structure is a movement that gradually opens while moving to the left side and a gradual opening while moving to the right side with respect to the upper dentition model mounted on the upper jaw mounting part. It becomes a movement. Therefore, with respect to the maxillary dentition model mounted on the maxillary mounting part, while migrating to the left and right, it was guided to the canine and gradually opened to simulate the canine guidance that does not apply lateral pressure to the molar part. The movement of the lower dentition model can be easily reproduced.

It is a figure which shows the structure of a human jaw in the state which closed the mouth. It is a figure which shows the structure of a human jaw in the state which opened the mouth. It is a perspective view which shows the structure of a human lower jaw. It is a side view which shows the movement of a lower jaw. It is a top view which shows the movement of the lower jaw It is a perspective view which shows the articulator which shows one Embodiment of this invention. It is a disassembled perspective view which shows the articulator which concerns on one Embodiment of this invention. It is a front view which shows the articulator which concerns on one Embodiment of this invention. It is a side view which shows the articulator which concerns on one Embodiment of this invention. It is a top view which shows the articulator which concerns on one Embodiment of this invention. It is sectional drawing which shows the cross section cut | disconnected by the IV (b) -IV (b) line | wire shown in FIG. 7 of the articulator which concerns on one Embodiment of this invention. It is a perspective view which shows the lower jaw support structure in the articulator which concerns on one Embodiment of this invention. It is a figure which shows the correspondence of the lower jaw support structure shown in FIG. 11, and a human lower jaw. It is a disassembled perspective view which shows the support structure of the suspension support frame body in the lower jaw support structure shown in FIG. It is a disassembled perspective view which shows the principal part of the support structure of a suspension support frame body. It is a disassembled perspective view which shows the structure of the front guide block which supports the front spindle part of a lower support stand slidably. It is a perspective view which shows the state which has the front spindle part of a lower support stand in the neutral position of a front guide block. It is a front view which shows the state which has the front support shaft part of a lower support stand in the neutral position of a front guide block. It is a perspective view which shows the state by which the front spindle part of the lower support stand was distributed to the right side by the front guide block. It is a perspective view which shows the state by which the front spindle part of the lower support stand was distributed to the left side by the front guide block. It is a front view which shows the state by which the front spindle part of a lower support stand is distributed to right and left with a front guide block. It is a figure shown about the adjustment range of the distribution angle of the front spindle part of the lower support stand by a front guide block. It is a figure which shows the relationship between the occlusal plane of a person's upper jaw and lower jaw, and a Frankfurt plane. It is a front view which shows the articulator of the state which the front-end | tip part of the lower jaw support structure moved to diagonally downward right. It is a side view which shows the articulator of the state which the front-end | tip part of the lower jaw support structure moved to diagonally downward right. Position and suspension support of right support shaft (ball body) and left support shaft (ball body) in right support block and left support block with tip of lower jaw support structure moving diagonally downward to the right It is a figure which shows the state of a flame | frame. It is a front view which shows the articulator of the state which the front-end | tip part of the lower jaw support structure moved to diagonally downward left. It is a front view which shows the articulator of the state which the front-end | tip part of the lower jaw support structure moved to diagonally downward left. Position and suspension support of the right support shaft (ball body) and the left support shaft (ball body) in the right support block and the left support block with the tip of the lower jaw support structure moving diagonally downward to the left It is a figure which shows the state of a flame | frame. It is a front view which shows the articulator in the state which has a lower jaw support structure in a neutral position. The positional relationship between the right support block and the left support block projecting from the suspension frame body and the right support block and the left support block slidably supported with the lower jaw support structure in the neutral position. FIG. It is a perspective view which expands and shows the positional relationship of the right support shaft part which protrudes from a suspending frame body, and the right support block which supports it slidably in the state which has a lower jaw support structure in a neutral position. It is a perspective view which shows the positional relationship of the left support shaft part which protrudes from a suspending frame body, and the left support block which supports it slidably in the state which has a lower jaw support structure in a neutral position. It is a front view which shows the articulator in the state which the front-end | tip part of the lower jaw support structure moved to diagonally downward left. The right support shaft and the left support shaft projecting from the suspension frame body and the right support block and the left support block for slidably supporting the left support shaft in a state where the distal end of the lower jaw support structure is moved obliquely downward to the left FIG. The positional relationship between the right support shaft projecting from the suspension frame body and the right support block for slidably supporting it is shown in a state where the tip of the lower jaw support structure moves obliquely downward to the left. It is a perspective view. The positional relationship between the left support shaft protruding from the suspension frame and the left support block slidably supported in the state where the tip of the lower jaw support structure is moved obliquely to the left is shown enlarged. It is a perspective view. It is a front view which shows the articulator in the state which the front-end | tip part of the lower jaw support structure moved to diagonally downward left further. The right and left support shafts projecting from the suspension frame and the right support block and the left support for slidably supporting the left and right support shafts in a state where the tip of the lower jaw support structure is further moved diagonally to the left. It is a top view which shows the positional relationship with a block. Enlarging the positional relationship between the right support shaft that protrudes from the suspension frame and the right support block that slidably supports the tip of the lower jaw support structure moving further diagonally to the left. It is a perspective view shown. Enlarging the positional relationship between the left support shaft that protrudes from the suspension frame and the left support block that slidably supports the tip of the lower jaw support structure moving further diagonally to the left. It is a perspective view shown. It is a figure which shows the state from which the upper jaw and the lower jaw were spaced apart by canine guidance.

  Embodiments of the present invention will be described with reference to the drawings.

  The articulator according to one embodiment of the present invention is configured as shown in FIGS. 5 is a perspective view showing the articulator, FIG. 6 is an exploded perspective view showing the articulator, FIG. 7 is a front view showing the articulator, and FIG. 8 is a side view showing the articulator. FIG. 9 is a plan view showing the articulator, and FIG. 10 is a cross-sectional view showing a cross section taken along line IV (b) -IV (b) in FIG. 7 of the articulator. The longitudinal and lateral directions of the maxillary dentition model DM1 and the mandibular dentition model DM2 set in the articulator 100 are defined as the longitudinal and lateral directions of the articulator 100, and are orthogonal to the longitudinal and lateral directions. The vertical direction of the maxillary dentition model DM1 and the mandibular dentition model DM2 set in the articulator 100 is defined as the vertical direction of the articulator 100.

  The articulator 100 shown in FIGS. 5 to 10 includes a lower jaw support structure 110 having a structure as shown in FIGS. 11 and 12. The lower jaw support structure 110 includes a lower jaw support base 60 (lower jaw mounting portion) and a suspension support frame body 40 (hanging support). The lower jaw support stand 60 is a front plate 61, a lower jaw placing plate 62 placed on the upper surface of the support plate 61 so as to be movable back and forth, and projecting forward from the tip of the support plate 61. And a support shaft portion 63 (third support shaft portion). A long hole (not shown) extending in the front-rear direction is formed in the support plate 61, and a hole (not shown) is formed in the lower jaw placing plate 62. The long hole and the hole are connected to a lower jaw fixing screw 64 (FIG. 8). See). A screw portion is formed at the distal end portion of the lower jaw fixing screw 64, and this screw portion and a screw hole of the lower jaw mounting plate 65 placed on the lower jaw mounting plate 62 are screwed together to form the lower jaw mounting plate 65 and the lower jaw mounting. The lower jaw mounting plate 65 is fixed on the lower jaw mounting plate 62 by fastening the placement plate 62 and the support plate 61 with the lower jaw fixing screw 64. That is, the lower jaw dentition model DM2 formed on the lower jaw mount plate 65 is mounted on the lower jaw mounting plate 62 and supported by the lower jaw support base 60 (see FIGS. 5, 6, and 8). Further, when the tightening of the lower jaw fixing screw 64 is loosened, the lower jaw mounting plate 62 on which the lower jaw mounting plate 65 is placed can be moved back and forth along the long hole of the support plate 61. That is, the lower jaw dentition model DM2 formed on the lower jaw mount plate 65 can be moved back and forth.

  The suspension support frame body 40 is formed into a quadrilateral shape by a lower side frame part 41, an upper side frame part 42, a right side frame part 43a, and a left side frame part 43b. The upper side frame part 42 is shorter than the lower side frame part 41, and the lower side frame part 41 And the right side frame 43a and the left side frame 43b which connect the corresponding edge part of each upper side frame part 42 shorter than it are stepped shapes, respectively. The support plate 61 of the lower jaw support base 60 is screwed and fixed to the lower frame portion 41 so as to protrude forward from the lower frame portion 41 of the suspended support frame body 40 (see FIG. 6).

  As shown in FIG. 13, a mounting hole 44b having a predetermined depth is formed at the left end portion of the upper frame portion 42 of the hanging frame body 40 so as to open at the left end surface, and the mounting hole 44b. A through hole 45b penetrating in the front-rear direction is formed so as to be orthogonal to the front-rear direction. Similarly, an attachment hole 44a and a through hole 45a are formed in the right end portion of the upper frame portion 42 (see FIG. 14). As shown in FIG. 14 together with FIG. 13, sleeve bodies 47a and 47b having flanges formed at one end surfaces thereof are fitted into the through holes 45a and 45b at the right end and left end of the upper side frame portion. Through holes are formed in the cylindrical sleeve bodies 47a and 47b so as to be orthogonal to the sleeve bodies 47a and 47b, and the sleeve bodies 47a and 47b are passed through the upper side frame part 42 until the flange contacts the surface of the upper side frame part 42. By fitting into the holes 45a and 45b, the mounting holes 44a and 44b and the through holes of the sleeve bodies 47a and 47b are in communication with each other.

  The shaft body 461 and the ball body 462 formed at the tip of the shaft body 461 constitute the right support shaft portion 46a (first support shaft portion) and the left support shaft portion 46b (second support shaft portion). (See FIGS. 13 and 14). With the sleeve bodies 47a, 47b properly fitted in the through holes 45a, 45b of the upper frame portion 42, the mounting holes 44a, 44b and the shaft bodies 461 of the right support shaft portion 46a and the left support shaft portion 46b communicate with each other. The sleeve bodies 47a and 47b are inserted into the through holes. As a result, the sleeve bodies 47a and 47b are prevented from being removed from the mounting holes 44a and 44b. Further, threaded portions are formed on the inner surfaces of the sleeve bodies 47a and 47b, and screws 48a and 48b are screwed into the threaded portions from the ends opposite to the ends where the flanges of the sleeve bodies 47a and 47b are formed. By tightening together, the right support shaft portion 46a and the shaft body 461 of the left support shaft portion 46b penetrating the sleeve bodies 47a and 47b are fixed in the sleeve bodies 47a and 47b, that is, in the mounting holes 44a and 44b. The Accordingly, as shown in FIG. 12, in the lower jaw support structure 110, the ball body 462 of the right support shaft portion 46a protrudes from the right end portion of the upper side frame portion 42 of the hanging frame body 40, and the left side of the upper side frame portion 42. The ball body 462 of the left support shaft portion 46b protrudes from the end portion.

  The ball body of the right support shaft portion 46a is adjusted by adjusting the positions of the shaft bodies 461 in the mounting holes 44a and 44b of the right support shaft portion 46a and the left support shaft portion 46b with the screws 48a and 48b loosened. The distance between 462 and the ball body 462 of the left support shaft portion 46 can be adjusted (inter-support shaft adjustment mechanism).

  Further, in the articulator 100 shown in FIGS. 5 to 10, a right column 11a and a left column 11b are erected at both front corners of the base plate 10, and an L-shaped right frame plate 12a at both rear corners and A left pedestal plate 12b is provided. And as FIG. 13 shows in detail the structure of the left rear part of the articulator 100, the left support plate 21b is screwed to the front end surface of the left gantry plate 12b. Grooves 211 extending in the horizontal direction (left-right direction) are formed in the left support plate 21b. Further, the left support plate 21b is not a simple rectangular shape, but has a partially protruding shape, and a holding plate 25 that rotatably holds an upper jaw mounting portion 50 to be described later is provided at the edge of the protruding portion. A left mounting plate base 22b for mounting is fixed. The left slide plate 23b is overlaid on the portion of the left support plate 21b where the groove 211 is formed, and the linear protrusion 231 formed on the left slide plate 23b is fitted into the groove 211 of the left support plate 21b. A long hole 232 extending in the lateral direction is formed in the left slide plate 23b, and the left slide plate 23b is fastened and fixed to the left support plate 21b by screws through the long holes 232. Then, in the state where the screw tightened through the long hole 232 is loosened, the left slide plate 23b is formed in the left and right direction on the left support plate 21b while the linear protrusion 231 slides in the groove 211. It can move within the length range of 231.

  A left block mounting plate 24b is fixed to the right edge portion of the left slide plate 23b with screws. The left block mounting plate 24b is provided with a support pin (not shown) that rotatably supports the left support block 30b (second support block), and a predetermined arc around the support pin. An arc-shaped long hole 241 is formed. The left support block 30b includes a block main body 31b and a cover plate 32b. The block main body 31b is mounted on the left block mounting plate 24b so as to be inclined obliquely forward and downward so that the support pin of the left block mounting plate 24b is fitted into a bearing hole formed in the block main body 31b. Then, the block main body 31b (left support block 30b) is fastened and fixed to the left block mounting plate 24b by screws passed through the arc-shaped long holes 241. The left support block 30b is rotated by rotating the block main body 31b (the left support block 30b) around the support shaft pin fitted in the bearing hole in a state where the screw tightened through the arc-shaped long hole 241 is loosened. Can be adjusted (second downward adjustment mechanism).

  The structure of the right rear part of the articulator 100 is the same as the left rear part (see FIG. 13) described above, the right support plate 21b, the right mounting plate base 22a, the right slide on the right frame plate 12a provided on the base plate 10. The plate 23a and the right block mounting plate 24a are sequentially assembled and fixed (see FIG. 6). Then, the right support block 30a (first support block) composed of the block main body 31a and the cover plate 32a is mounted on the right block mounting plate 24a in a state where the right support block 30a is inclined obliquely downward and forward. Yes. Similarly to the case of the left support block 30b, the screws that fasten and fix the right support block 30a to the right block mounting plate 24a are loosened, and the block main body 31a (right support block 30a) is fitted into the bearing hole. By rotating about the shaft pin, the oblique downward direction of the right support block 30a can be adjusted (first downward adjustment mechanism).

  Further, the right slide plate 23a to which the right block mounting plate 24a to which the right support block 30a is attached is fixed is loosened to slide the right slide plate 23a in the left-right direction on the right support plate 21a and to the left support. By loosening the screws that fix the left slide plate 23b to which the left block mounting plate 24b to which the block 30b is attached is fixed and sliding the left slide plate 23b in the left-right direction on the left support plate 21b, The distance between the left support block 30b can be adjusted (inter-block adjustment mechanism).

  The right support block 30a (first support block) and the left support block 30b (second support block) are in a symmetrical relationship. Each of the block main body 31a of the right support block 30a and the block main body 31b of the left support block 30b has a concave shape in the block main body 31a (31b) as shown in FIG. 14 showing the structure of the block main body 31a of the right support block 30a. The sliding surface 311 is formed. The ball body 462 of the right support shaft portion 46a protruding from the right end of the upper frame portion 42 of the suspended support frame body 40 is required for the concave sliding surface 311 formed on the block main body 31a of the right support block 46a. It is paid with the play of. Then, as shown in FIG. 11, the cover plate 32a is screwed and fixed to the block body 31a so as to cover the ball body 462, thereby preventing the ball body 462 from floating in the block body 31a. Similarly to the ball body 462 of the right support shaft portion 46a, the ball body 462 of the left support shaft portion 46b protruding from the left end of the upper side frame 42 of the suspended support frame body 40 is also provided with the left support block 30b (block body 31b). , And the cover plate 32b) (see FIG. 11). In this manner, the ball body 462 of the right support shaft portion 46a protruding from the right end of the upper portion (upper frame portion 42) of the suspension support frame body 40 is supported slidably forward and downward by the right support book 30a. The ball body 462 of the left support shaft portion 46b protruding from the left end of the upper portion (upper frame portion 42) of the suspension support frame body 40 is supported slidably forward and downward by the left support block 30b.

  Further, in the articulator 100 shown in FIGS. 5 to 10, as shown in FIG. 12, the front support shaft portion 63 protruding from the front end portion of the support plate 61 of the lower jaw support base 60 of the lower jaw support structure 110 is engaged. Thus, the front guide block 80 is arranged. Specifically, a pair of mounting blocks 16a and 16b are fixed between the right column 11a and the left column 11b at the front portion of the base plate 10, and the front guide block 80 is screwed to the mounting blocks 16a and 16b. It is fixed by. As shown in FIG. 15, the front guide block 80 is integrated by fixing the first central block 81a, the second central block 81b, the right block 82a, the left block 82b, and the holding block 84 to the front plate 17 with screws. It is constituted by. The first central block 81a, the second central block 81b, the right block 82a, and the left block 82b are each a fan-shaped block body, and are arranged in a fan shape as a whole. A right slide space 83a is formed between the first center block 81a and the right block 82a, and a left slide space 83b is formed between the second center block 81b and the left block 82b.

  When the front support shaft portion 63 protruding from the front end portion of the support plate 61 of the lower jaw support base 60 is in a state where no force is applied to the lower jaw support structure 110 (the lower jaw support 60, the suspended support frame body 40), As shown in FIGS. 16A and 16B, the center position of the fan of the front guide block 80, that is, the position corresponding to the leading ends of the fan-shaped first central block 81a and the second central block (hereinafter, referred to as neutral position as appropriate). It is in. At this time, the holding block 84 prevents the front support shaft portion 63 from being lifted. As shown in FIG. 17, the front support shaft portion 63 is guided from the neutral position (see FIGS. 16A and 16B) to the right while being guided in the right slide space 83a between the first central block 81a and the right block 82a. It is possible to move diagonally downward. Further, as shown in FIG. 18, the front support shaft portion 63 moves obliquely downward to the left while being guided in the left slide space 83b between the second central block 81b and the left block 82b from the neutral position. Is possible. Accordingly, the front support shaft portion 63 protruding from the front end portion of the support plate 61 of the lower jaw support base 60 is distributed and guided obliquely downwards by the front guide block 80 as shown in FIG.

  In addition, as shown in FIG. 20, the right slide can be obtained by rotating the first central block 81a and the right block 82a around the front end portion of the fan while loosening the screws that fasten and fix the first central block 81a and the right block 82a to the front plate 17. The inclination angle of the space 83a, that is, the distribution angle of the front support shaft portion 63 obliquely downward to the right can be adjusted within a predetermined angle range A. Similarly, the left slide space 83b can be tilted by rotating the second center block 81b and the left block 82b around the front end of the fan while loosening the screws that fasten and fix the second block 81b and the left block 82b to the entire plate 17. The angle, that is, the distribution angle of the front support shaft portion 63 obliquely downward to the left can be adjusted within a predetermined angle range A (distribution angle adjustment mechanism).

  Further, the articulator 100 shown in FIGS. 5 to 10 has an upper jaw mounting portion 50 (corresponding to an upper arch in a known articulator). The upper jaw mounting portion 50 has a support plate 51 and a slide plate 53 placed on the upper surface of the support plate 51 so as to be movable back and forth. A long hole (not shown) extending in the front-rear direction is formed in the support plate 51, and a hole (not shown) is formed in the slide plate 53, and the upper jaw fixing screw 54 passes through the long hole and the hole. Yes. A screw portion is formed at the distal end portion of the upper jaw fixing screw 54, and this screw portion and a screw hole of the upper jaw mount plate 56 (see FIG. 8) disposed on the back side of the support plate 51 are screwed together, and the upper jaw When the mount plate 56, the support plate 51, and the slide plate 52 are fastened by the upper jaw fixing screw 54, the upper jaw mount plate 56 is fixed to the back side of the support plate 51. That is, the maxillary dentition model DM1 formed on the maxillary mount plate 56 is mounted on the support plate 51 (see FIGS. 5, 6, 7, and 8). Further, when the tightening of the upper jaw fixing screw 54 is loosened, the upper jaw mount plate 56 can be moved back and forth along the long hole of the support plate 51 together with the slide plate 52. That is, the maxillary dentition model DM1 formed on the maxillary dentition mount plate 56 can be moved back and forth.

  Further, in the articulator 100 shown in FIGS. 5 to 10, as described above, the right mounting plate base 22a fixed to the right base plate 12a via the right support plate 21a, and the left support plate 21b to the left base plate 12b. On the holding plate 25 fixed to the left mounting plate base 22b fixed via a screw, a concave portion 251 is formed that opens forward. A pair of receiving recesses 252a and 252b are formed at predetermined positions on the right and left sides of the recess 251 of the holding plate 25. Support pins 52 a and 52 b projecting left and right are provided at predetermined positions on the rear part of the support plate 51 of the upper jaw mounting part 50, and the rear part of the support plate 51 enters the concave part 251 of the holding plate 25. Support pins 52a and 52b are fitted into receiving recesses 252a and 252b. Then, presser plates 26a and 26b are fixed to the holding plate 25 so as to cover the receiving recesses 252a and 252b. These presser plates 26a and 26b prevent the support pins 52a and 52b of the support plate 51 from being lifted. As described above, since the support pins 52a and 52b are fitted into the receiving recesses 252a and 252b of the holding plate 25, the support plate 51 (upper jaw mounting portion 50) rotates around the support pins 52a and 52b. It becomes possible to do.

  A horizontal bar 13 is provided between the tip of the right column 11a and the tip of the left column 11b. The horizontal bar 13 is fixed to the tip of the right column 11a by a set screw 14a, and the left column 11b by a set screw 14b. It is fixed to the tip of the. As described above, the front end portion of the support plate 51 held on the holding plate 25 so as to be rotatable by the support pins 52 a and 52 b reaches the horizontal bar 13, and the front end portion of the support plate 51 is laterally moved by the set screw 55. It is fixed to the bar 13. By removing the set screw 55, the support plate 51 can be turned upright with the support pins 52a and 52b as axes. The support plate 51 is in a horizontal state parallel to the base plate 10 with the distal end portion of the support plate 51 (upper jaw mounting portion 50) being fixed to the horizontal bar 13.

  Furthermore, in the articulator 100 shown in FIGS. 5 to 10, the lower support frame body 40 is disposed on the left and right sides of the lower support frame body 41 at intervals slightly wider than the width of the support plate 61 fixed to the lower support frame portion 41. Two hooking pins 49a, 49b are provided, and two hooking pins 15a, 15b are arranged at predetermined positions on the base plate 10 on the left and right sides with substantially the same interval as the interval between the hooking pins 49a, 49b. Is provided. A lower right spring 71a is hooked on one hook pin 49a of the lower frame part 41 (lower part of the suspension support frame body 40) and one hook pin 15a provided on the base plate 10. Further, the lower left spring 71b is hooked on the other hook pin 49b of the lower frame portion 41 (lower part of the suspension support frame body 40) and the other hook pin 15b provided on the base plate 10. . The lower frame portion 41 of the suspension support frame body 40 is elastically supported by two springs, a right lower spring 71a and a left lower spring 71b, to resist the movement (elastic support mechanism: lower elastic support mechanism).

  Two hooking pins 28a and 28b are provided on the rear surface of the upper frame portion 42 of the suspension support frame body 40 with a predetermined interval on the left and right sides, and on the rear end surface of the holding plate 25 with a predetermined interval. Two L-shaped hook pins 27a and 27b are provided on the left and right. An upper right spring 72 a is hooked on one hook pin 28 a of the upper frame portion 42 (upper part of the suspension support frame body 40) and one hook pin 27 a provided on the holding plate 25. A left upper spring 72b is hooked on the other hook pin 28b of the upper frame portion 42 (upper part of the suspension support frame body 40) and the other hook pin 27b provided on the holding plate 25. . The upper frame portion 42 of the suspension support frame body 40 is elastically supported by two springs, an upper right spring 72a and an upper left spring 72b, to resist the movement (elastic support mechanism: upper elastic support mechanism).

  The lower jaw support structure 110, that is, the lower jaw support base 60 and the suspension support frame 40 that supports and suspends the lower jaw spring 71a, the lower left spring 71b, the upper right spring 72a, and the upper left spring 72b as a whole. These four springs (elastic support mechanisms) are elastically supported so as to resist the movement of the lower jaw support structure 110.

  In the articulator 100 having the above-described structure, as shown in FIG. 12, the right support shaft portion 46 a and the left support projecting from the right end and the left end of the upper frame portion 42 of the suspension support frame body 40 of the lower jaw support structure 110. The ball body 462 of the shaft portion 46b corresponds to the right mandibular head MHR and the left mandibular head MHL in the mandible Man. The sliding surfaces 311 (see FIGS. 13 and 14) of the right support block 30a and the left support block 30b (block body 31a) that support the ball bodies 462 of the right support shaft portion 46a and the left support shaft portion 46b It can be considered that it corresponds to the right lower cave MFR and the left lower cave MFL (see FIGS. 1A to 4) in the lower jaw Man.

  A usage example of the articulator 100 having the above-described structure will be described.

First, the maxillary dentition model DM1 of a dental care patient is produced. The maxillary dentition model DM1 can be manufactured according to a known method. Further, the maxillary dentition model DM1 can be produced by using the maxillary dentition model adjuster (see JP 2013-52169A) already proposed by the present inventor. In this case, first, X-ray standard photography (cephalometric radiography) of the head including the jaw part of the dental treatment patient is performed. Then, for example, in the X-ray standard photographic image (cephalo X-ray photographic image) as shown in FIG. 21 obtained by this X-ray standard photographic image, A plane formed by connecting the upper line of the ear canal, and the Frankfurt plane PL _FF which is assumed to be substantially parallel to the ground surface when the dental treatment patient H stands upright, and the occlusal plane PL _OCC between the upper and lower jaws of the dental treatment patient H The formed angle α is measured.

In the maxillary dentition model adjuster disclosed in Japanese Patent Application Laid-Open No. 2013-52169, the inclination of the reference plate is set so that the inclination angle of the concave reference plate is the angle α measured as described above. Adjusted. In the state where the reference plate is tilted (angle α), the upper teeth are arranged on the reference plate to produce an upper dentition model DM1 (see JP 2013-52169 A). In articulator 100, the upper jaw mounting portion 50 (support plate 51: upper bow equivalent) and is likened to Frankfort horizontal plane _{PL OCC,} surface Haretsu tip of the upper jaw teeth model DM1 against the upper jaw mounting portions 50 are in contact (occlusal plane The maxillary dentition model DM1 is mounted on the maxillary mounting portion 50 so that the angle formed by Specifically, for example, when the maxillary dentition model DM1 (with the maxillary mount plate 56) is formed on the reference plate of the maxillary dentition model adjuster whose inclination angle is adjusted to the angle α, the lower jaw support The maxillary dentition model adjuster is set on the support plate 61 of the table 60 instead of the mandibular placement plate 62, and the maxillary dentition model DM1 on the maxillary dentition model adjuster is formed. 56 is fixed to the support plate 51 and the slide plate 53 by a set screw 54. As a result, the upper dentition model DM1 is mounted on the upper jaw mounting part 50 in a state where the angle formed by the surface (corresponding to the occlusal surface) of the upper dentition model DM1 with respect to the upper jaw mounting part 50 is the angle α. Will be attached to.

  Further, in the X-ray standard photographic image shown in FIG. 21, the distance L from the lower jaw head to the front of the upper jaw (or lower jaw), for example, the position of the canine is measured. And the front-back direction between the canine part of the maxillary dentition model DM1 mounted on the upper jaw mounting part 50 of the articulator 100 and the right support shaft part 46a and the left support shaft part 46b (shaft body 461, ball body 462). , The set screw 54 is loosened, and the position in the front-rear direction of the slide plate 53 on which the maxillary dentition model DM1 is mounted via the maxillary mount plate 56 is adjusted. A scale is engraved on the front portion of the support plate 51 of the upper jaw mounting portion 50 (see FIG. 9), and the front and back positions of the slide plate 53 can be adjusted using the scale as a guide.

  After the maxillary dentition model DM1 is mounted on the maxillary mounting part 50 as described above, the mandibular dentition model DM2 manufactured so as to mesh with the maxillary dentition model DM1 is the mandibular support base 60 of the mandibular support structure 110. It is attached to. Specifically, the lower jaw dentition model DM2 is mounted via the lower jaw mount plate 65 so that the lower dentition model DM2 is engaged with the upper dentition model DM1 mounted on the upper jaw mounting portion 50. The position of the plate 62 in the front-rear direction is adjusted, and the mandibular dentition model DM2 is fixed to the mandibular support 60 by tightening the lower jaw fixing screw 64 at an appropriate position.

  As described above, the upper dentition model DM1 and the lower dentition model DM2 are set in the articulator 100 as shown in FIGS. Then, the occlusal state between the maxillary dentition model DM1 and the mandibular dentition model DM2 can be confirmed as follows.

  For example, when the front end portion of the lower jaw support base 60 is pushed obliquely downward to the right, the front support shaft portion 63 that protrudes forward from the front end portion of the lower jaw support base 60 (support plate 61) is shown in FIGS. 17), it is guided along the right slide space 83a between the first center block 81a and the right block 82a of the front guide block 80 and moves obliquely downward to the right. As the front end portion of the lower jaw support base 60 moves obliquely downward to the right, as shown in FIG. 23, the ball body 462 of the left support shaft portion 46b moves forward and obliquely downward on the sliding surface 311 in the left support block 30b. And the ball body 462 of the right support shaft portion 46a is supported by the right support block 30a without sliding forward and obliquely downward on the sliding surface 311. Therefore, the suspension support frame body 40 and the lower jaw support base 60 suspended and supported by the suspension support frame body 40 are integrally suspended by the four springs of the lower right spring 71a, the lower left spring 71b, the upper right spring 72a, and the upper left spring 72b. While receiving an elastic action against the movement of the support frame body 40 and the lower jaw support base 60, the ball body 462 of the right support shaft portion 46a is pivoted substantially obliquely downward to the right. The movement of the lower jaw dentition model DM2 is moved to the upper jaw mounting portion 50 by the movement of the lower jaw support base 60 and the suspension support frame body 40 (lower jaw support structure 110) to which the lower jaw dentition model DM2 is attached. With respect to the mounted maxillary dentition model DM1, the movement gradually opens while moving in the right direction (see FIG. 22A). Here, as described above, the lower jaw support base 60 is rotated substantially diagonally downward to the right with the ball body 462 of the right support shaft portion 46b as a fulcrum, so that the lower jaw dentition model DM2 mounted on the lower jaw support base 60 Tends to open faster to the maxillary dentition model DM1 than to the far left from the fulcrum.

  On the other hand, when the front end portion of the lower jaw support base 60 is pushed obliquely downward to the left, for example, the front support shaft portion 63 of the lower jaw support base 60 is moved forward as shown in FIGS. 24A and 24B (see also FIG. 18). Guided along the left slide space 83b between the second central block 81b and the left block 82b of the guide block 80, the guide block 80 moves obliquely to the left. As the front end portion of the lower jaw support base 60 moves obliquely downward to the left, as shown in FIG. 25, the ball body 462 of the right support shaft portion 46a moves forward obliquely downward on the sliding surface 311 in the right support block 30a. The ball body 462 of the left support shaft portion 46b is supported by the left support block 30b without sliding forward and obliquely downward on the sliding surface 311. Therefore, the suspension support frame body 40 and the lower jaw support base 60 suspended and supported by the suspension support frame body 40 are integrally suspended by the four springs of the lower right spring 71a, the lower left spring 71b, the upper right spring 72a, and the upper left spring 72b. While receiving the elastic action against the movement of the support frame body 40 and the lower jaw support base 60, the ball body 462 of the left support shaft portion 46b is pivoted substantially obliquely downward to the left. The movement of the lower jaw dentition model DM2 is moved to the upper jaw mounting portion 50 by the movement of the lower jaw support base 60 and the suspension support frame body 40 (lower jaw support structure 110) to which the lower jaw dentition model DM2 is attached. With respect to the mounted maxillary dentition model DM1, the movement gradually opens while moving in the left direction (see FIG. 24A). Here, as described above, the lower jaw support base 60 is rotated approximately diagonally to the left with the ball body 462 of the left support shaft portion 46b as a fulcrum, so that the lower jaw dentition model DM2 mounted on the lower jaw support base 60 is provided. Tends to open faster to the maxillary dentition model DM1 than to the farthest from the fulcrum.

  Furthermore, it demonstrates in detail.

  When no force acts on the lower jaw support base 60 and the suspension support frame body 40 (lower jaw support structure 110), the front support shaft portion 63 is in a neutral position as shown in FIG. 26A. 26B, 26C, and 26D, the ball body 462 of the right support shaft portion 46a is maintained at the initial position So of the sliding surface 311 of the right support block 30a, and similarly, the left support shaft portion 46b. The ball body 462 is maintained at the initial position. In this case, as shown in FIG. 26A, the lower dentition model DM2 mounted on the lower support 60 is maintained closed with respect to the upper dentition model DM1 mounted on the upper mount 50 (not shown). doing.

  From this state, for example, when trying to reproduce the movement of canine guidance by the left canine, the front end portion of the lower jaw support base 60 is pushed diagonally downward to the left. Then, as shown in FIG. 27A (see also FIG. 18), the front support shaft portion 63 moves from the neutral position of the front guide block 80 (see FIG. 26A) to the left between the second central block 81b and the left block 82b. It is guided along the slide space 83b and moves obliquely downward to the left. In the process in which the front support shaft portion 63 is moved while being distributed obliquely downward and leftward by the front guide block 80, the ball body 462 of the right support shaft portion 46a is moved to the right support block 30a (block as shown in FIG. 27C together with FIG. 27B). The sliding surface 311 in the main body 31a) is slid obliquely downward to move from the initial position So to a lower position S1. At this time, as shown in FIG. 27D together with FIG. 27B, the ball body 462 of the left support shaft portion 46b is maintained in a state of being supported by the left support block 30b without sliding forward and obliquely downward on the sliding surface 311. The As a result, the suspension support frame body 40 and the lower jaw support base 60 suspended and supported by the suspension support body 40 and rotate slightly slightly to the left obliquely with the ball body 462 of the left support shaft portion 46b as a fulcrum. . At this time, the mandibular dentition model DM2 mounted on the mandibular support base 40 opens slightly while moving slightly to the left with respect to the maxillary dentition model DM1, as shown in FIG. 27A.

  Further, when the front end portion of the lower jaw support base 60 continues to be pushed diagonally to the left, the front support shaft portion 63 guided along the left slide space 83b of the front guide block 80 further moves to the left as shown in FIG. 28A. Move diagonally downward. As the lower jaw support base 60 further moves diagonally to the left, the ball body 462 of the right support shaft portion 46a is moved into the right support block 30a (block body 31a) as shown in FIG. 28C together with FIG. 28B. The sliding surface 311 is slid obliquely downward to move from the position S1 to a further lower position S2. At this time, as shown in FIG. 28D together with FIG. 28B, the ball body 462 of the left support shaft portion 46b is still supported by the left support block 30b without sliding on the sliding surface 311 diagonally forward and downward. Maintained. As a result, the suspension support frame body 40 and the lower jaw support base 60 suspended and supported by the suspension support body 40 are integrally rotated further obliquely to the left and downward with the ball body 462 of the left support shaft portion 46b as a fulcrum. At this time, as shown in FIG. 28A, the lower jaw dentition model DM2 mounted on the lower jaw support base 40 is further moved leftward with respect to the upper dentition model DM1, and the right side portion opens faster. It opens further with a tendency.

When the maxillary dentition model DM1 and the mandibular dentition model DM2 are appropriately manufactured, the mandibular dentition model DM2 moves in the left direction as described above. In the process of opening the right part gradually with a tendency to open earlier, the left canine part of the lower dentition model DM2 contacts the left canine part of the upper dentition model DM1, and there is a gap between each molar part. It will go through a state where it can be done. As shown in FIG. 29, the movement of the lower dentition model DM2 with respect to the upper dentition model DM1 is such that when the lower jaw Man is moved to the left, the left canine CLmax of the upper jaw Max and the left canine CLman of the lower jaw Man are The lower jaw Man is guided by contact (refer to part E) and opens with respect to the upper jaw Max, that is, it corresponds to canine guidance. In this case, due to canine guidance, the lower jaw Man moves to the left diagonally lower _DDDL with respect to the upper jaw Max.

  On the other hand, when the maxillary dentition model DM1 and the mandibular dentition model DM2 are not properly manufactured, the distal end portion of the mandibular support base 60 is pushed diagonally to the left and the mandibular dentition model DM2 becomes the maxillary dentition model DM1. For example, when the left canine part of the maxillary dentition model DM1 and the left canine part of the mandibular dentition model DM2 are caught, the mandibular dentition model DM2 does not move smoothly. Alternatively, the left cuspid portion of the lower dentition model DM2 comes into contact with the left cuspid portion of the upper dentition model DM1, and the lower dentition model DM2 opens without passing through a gap between the molar portions. , Etc. occur.

  In the example of use of the articulator 100 described above, the case of attempting to reproduce the movement of canine guidance by the left canine has been described. However, when reproducing the movement of canine guidance by the right canine, the lower dentition model DM2 is attached. The front end portion of the lower jaw support base 60 is pushed obliquely downward to the right. In this case, if the upper dentition model DM1 and the lower dentition model DM2 are appropriately produced, as in the case of trying to reproduce the movement of the canine guidance by the left canine, the lower dentition model DM2 is moved to the right. In the process of gradually opening the left part with a tendency to open earlier with respect to the upper dentition model DM1, the right canine part of the lower dentition model DM2 is the right canine of the upper dentition model DM1. It will be in a state where a gap is formed between the respective molar portions in contact with the portions. The movement of the lower dentition model MD2 corresponds to canine guidance.

  According to the articulator 100 as described above, it pivots approximately diagonally downward with the ball body 462 of the left support shaft portion 46b as a fulcrum and approximately diagonally downward with the ball body 462 of the right support shaft portion 46a as a fulcrum. The movement of the lower jaw dentition model MD3 supported by the lower chin support 60 is a movement that gradually opens while moving in the left direction and a movement in the right direction with respect to the upper dentition model MD1 mounted on the upper jaw mounting portion 50. However, the movement gradually opens. Therefore, the canine guide that moves to the left and right with respect to the maxillary dentition model MD1 mounted on the maxillary mount 50, is guided by the canine and gradually opens, and no lateral pressure is applied to the molar portion. Can be reproduced. Therefore, the occlusal state of the maxillary dentition model MD1 and the mandibular dentition model MD2 is confirmed using the articulator 100, and adjustment of the maxillary dentition model MD1 and the mandibular dentition model MD2 is performed based on the confirmation result. By doing so, it is possible to easily produce upper and lower dentures that can be engaged by canine guidance, which is one of the ideal occlusal states.

  As described above, in the above-described articulator 100, the right support shaft portion 46a and the left support shaft portion projecting from the right end and the left end of the upper side frame portion 42 of the suspension support frame body 40 of the lower jaw support structure 110. The ball body 462 of 46b corresponds to the right mandibular head MHR and the left mandibular head MHL in the mandible Man (see FIG. 12), and supports the ball body 462 of the right support shaft portion 46a and the left support shaft portion 46b. Sliding surfaces 311 (see FIGS. 13 and 14) of the block 30a and the left support block 30b (block body 31a) are located on the right lower cave MFR and the left lower cave MFL (see FIGS. 1A to 4) in the mandible Man. It is supposed to correspond. Accordingly, the distance between the ball body 462 of the right support shaft portion 46a and the ball body 462 of the left support shaft portion 46b (sleeve 47a) according to the size and structure of the jaw of the actual dental treatment patient (see FIGS. 1A to 4). 47b, structure including screw 48a, 48b), distance between right support block 30a and left support block 30b (see structure including right slide plate 23a and left slide plate 23b), right support block 30b and left support The obliquely downward direction of the block 30b (see the structure including the right block mounting plate 24a and the left block mounting plate 24b) and the distribution angle of the front support shaft portion 63 by the front guide block 80 (see the structure shown in FIGS. 17 and 20). ) Each can be adjusted.

  The articulator according to the present invention has an effect that the movement of the lower jaw dentition model imitating canine guidance occlusion can be easily reproduced with respect to the set upper jaw dentition model, It is useful as an articulator used for confirming and adjusting the occlusal state between the maxillary dentition model and the mandibular dentition model used when producing a prosthesis or denture of the mandible.

10 Base plate 11a Right column 11b Left column 12a Right frame plate 12b Left frame plate 13 Horizontal bar 14a, 14b Set screw 15a, 15b Hook pin 16a, 16b Mounting block 21a Right support plate 21b Left support plate 22a Right mounting plate base 22b Left mounting plate base 23a Right slide plate 23b Left slide plate 24a Right block mounting plate 24b Left block mounting plate 25 Holding plate 26a, 26b Holding plate 27a, 27b, 28a, 28b Latching pin 30a Right support block 30b Left support block 31a, 31b Block body 32a, 32b Cover plate 40 Suspension support frame body 41 Lower side frame part 42 Upper side frame part 43a Right side frame part 43b Left side frame 44a, 44b Mounting hole 45a, 45b Through hole 46a Right support shaft part 46b Left support shaft part 47a, 47b Sleeve 48a, 48b Screw 49a, 49b Hook pin 50 Upper jaw mounting part 51 Support plate 52a, 52b Support pin 53 Slide Plates 54, 55 Set screw 56 Upper jaw mount plate 60 Lower jaw support base 61 Support plate 62 Lower jaw mounting plate 63 Front shaft 64 Lower jaw fixing screw 65 Lower jaw mount plate 71a Lower right spring 71b Lower left spring 72a Upper right spring 72b Upper left Spring 80 Front guide block 81a First center block 81b Second center block 82a Right block 82b Left block 83a Right slide space 83b Left slide space 84 Presser block 100 Articulator 110 Bottom The support structure 211 groove 231 linear projections 232 slot 241 arc-shaped long hole 251 recess 252a, 252b receiving recess 311 sliding face 461 shaft 462 ball member

Claims (8)

A maxillary dentition model and a mandibular dentition model are set in a state of facing each other, and an articulator that reproduces the occlusal state of the maxillary dentition model and the mandibular dentition model,
An upper jaw mounting portion on which the upper dentition model is mounted;
A lower jaw support structure for supporting the lower jaw dentition model disposed opposite to the upper dentition model below the upper dentition model mounted on the upper jaw mounting portion;
A first support shaft portion projecting laterally from the upper one side end of the lower jaw support structure and having a ball body at the tip;
A second spindle part protruding in the opposite direction to the first spindle part from the upper other end of the lower jaw support structure, and having a ball body at the tip;
A first support block that slidably supports the ball body of the first support shaft portion diagonally forward and downward;
A second support block that slidably supports the ball body of the second support shaft portion diagonally forward and downward;
A third spindle portion protruding forward from the front end portion of the lower jaw support structure;
A front guide block that guides the third support shaft in a diagonally downward direction from left to right;
An articulator having an elastic support mechanism for elastically supporting the lower jaw support structure so as to resist movement of the lower jaw support structure. The lower jaw support structure is
A lower jaw mounting portion for mounting the lower jaw dentition model;
A suspension support for hanging and supporting the lower jaw mounting part,
The first support shaft portion protrudes from the upper one side end of the suspension support,
The second spindle portion protrudes from the upper other end of the suspension support,
The articulator according to claim 1, wherein the third support shaft portion protrudes from a front end portion of the lower jaw mounting portion. The elastic support mechanism is
An upper elastic support mechanism for elastically supporting the upper part of the suspension support so as to resist the movement;
The articulator according to claim 2, further comprising a lower elastic support mechanism that elastically supports the lower part of the suspension support so as to resist the movement thereof.   The articulator according to claim 3, wherein the upper elastic support mechanism includes a plurality of springs extending rearward from the suspension support body between the first support shaft portion and the second support shaft portion.   The articulator according to claim 4, wherein the lower elastic support mechanism includes a plurality of springs extending forward from a lower portion of the suspension support. An inter-spindle adjustment mechanism that adjusts an interval between the first support shaft part and the second support shaft part;
The articulator according to any one of claims 1 to 5, further comprising an inter-block adjustment mechanism that adjusts a distance between the first support block and the second support block. A first downward adjustment mechanism that adjusts the oblique downward direction of the first support block;
The articulator according to any one of claims 1 to 6, further comprising a second downward adjustment mechanism that adjusts an obliquely downward direction of the second support block.   The articulator according to any one of claims 1 to 7, further comprising a distribution angle adjustment mechanism that adjusts a distribution angle in each of the left and right diagonal directions of the third support shaft portion in the front guide block.

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