JP2933209B2 - Method for manufacturing denture and connecting teeth for positioning - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a denture and a positioning connecting tooth.

[0002]

2. Description of the Related Art Conventionally, dentures are generally manufactured through the following steps. [1] An upper and lower jaw shape (impression) of a patient is obtained on an alginate impression material or a silicone rubber impression material.

[2] Plaster is poured into the recess of the impression material to produce a plaster mold for the upper and lower jaws. [3] A plate of paraffin wax (a kind of wax) having a thickness of about 2 mm is pressed against opposing surfaces (mucosal surfaces) of the upper and lower plaster molds to form upper and lower temporary beds corresponding to gingiva. [4] A U-shaped or horseshoe-shaped wax embankment 11 as shown in FIG. 6 is attached to a portion where the teeth of the upper and lower temporary beds are to be arranged, thereby forming a jaw model 12 as shown in FIG. The jaw model 12 here comprises an upper jaw 12a and a lower jaw 12b, the upper jaw 12a from the upper temporary bed 10a and the wax ridge 11a, and the lower jaw 12b from the lower temporary bed 10b and the wax bank 11b, respectively. It is configured.

[5] The jaw model 12 (the upper jaw 12a and the lower jaw 12b) is inserted into the oral cavity of the patient and occluded. (Hereinafter, this is referred to as “test-fitting.”) Then, using a scalpel or the like, a horizontal line h overlapping the mouth corner line (a line connecting the left and right ends of the upper and lower lips) k as shown in FIG. Is inserted into the jaw model 12 and then taken out of the oral cavity. The jaw model 12 taken out is in a state as shown in FIG. That is, the wax embankment 11a and the wax embankment 11
b are pressed together with each other to form a vertically integrated wax ridge 11c, and a horizontal line h and a vertical line v are provided on the front surface of the wax ridge 11c.

[6] Temporary beds 10a, 10b of the jaw model 12
Then, the plaster molds of the above-mentioned jaws are fitted respectively, and the jaw model 12 is set on the dental articulator via the plaster molds. [7] While removing the wax embankment 11c, the temporary beds 10a, 10
A predetermined number of artificial teeth made of pottery, hard plastic or the like are embedded and arranged one by one in b. At this time, first, a pair of left and right maxillary central incisors is placed on the upper temporary bed 10a, a vertical line v is located between the teeth, and a lower end side of each tooth is a horizontal line h.
Embed in the state that overlaps. Next, the other maxillary anterior teeth (side incisors and canines) and upper molars are sequentially arranged outside of these central incisors. Then, artificial teeth (mandibular front teeth and mandibular molars) are arranged on the lower temporary bed 10b while the occlusal relationship (engagement) with the artificial teeth arranged on the upper temporary bed 10a is improved. When the artificial teeth are arranged, the temporary beds 10a and 10b are removed from the dental articulator and the plaster mold. Thus, what is called "wax denture" is one in which a predetermined number of artificial teeth are arranged on the temporary beds 10a and 10b made of wax.

[8] Trying the wax denture into the patient's oral cavity,
After confirming the esthetic and occlusal relationship of the teeth, the patient is taken out of the oral cavity.

[0007]

[9] The wax denture is embedded in gypsum put in a special flask. [10] After the gypsum is cured, the wax portion of the wax denture is melted and removed, and the resulting cavity is filled with an unpolymerized synthetic resin (such as an acrylic resin), and then heated to polymerize the resin. As a result, the wax portions of the wax denture (that is, the temporary beds 10a, 10
b) is replaced by a synthetic resin, and a denture in which artificial teeth are arranged on a synthetic resin floor is obtained. [11] Remove the denture from the flask and grind it. This completes the denture.

In general, the above [1], [5], [8]
The work related to each step is performed in a dental clinic,
[2] to [4], [6] to [7],

The work relating to each of the steps [9] to [11] is performed in a work place of a dental technician (hereinafter, referred to as “lab”).

[0009]

However, in the above-mentioned conventional method for manufacturing a denture, the horizontal line h and the vertical line v are not always accurately formed on the jaw model 12 in the step [5] in the dental clinic. It is not necessarily inserted, for example, the horizontal line h may be inclined with respect to the patient's mouth angle line k, or the vertical line v may be shifted to the left or right from the patient's midline s. Even if the horizontal line h or the vertical line v is incorrectly inserted, the dentist often does not notice it.

However, in the step [7] in the lab, the dental technician does not actually look in the patient's mouth, but the horizontal line h and the vertical line v
Since the artificial teeth were arranged while being positioned on the basis of only the above, if the horizontal line h or the vertical line v was incorrectly inserted as described above, the tooth row of the artificial tooth was tilted or moved up and down accordingly. It was shifted left and right. In this case, in the step of [8], in which the dental prosthesis is fit into the patient's mouth, for example, the dentition is inclined with respect to the mouth angle line k, so that the mouth looks distorted, Is out of the median line s.

In addition, since the image of each patient's own alignment of teeth is not uniform, the dentist has
Even if the dental technician correctly arranged the artificial teeth based on the accurate insertion of the vertical line v and the vertical line v, the tooth arrangement was not always the same as the image of the patient. However, the conventional horizontal line h and vertical line v do not allow the patient to imagine the teeth arrangement, and thus the patient's wishes for the teeth arrangement cannot be heard at the trial stage of the jaw model 12. Therefore, it was unavoidable that patients complained that the alignment of their teeth was different from their image when trying on wax dentures.

In the above case, the arrangement of the artificial teeth in the lab and the trial application of the wax denture in the dental clinic are repeated until the patient and the dentist have a satisfactory dentition. It would take a lot of trouble and time to manufacture the product. In addition, the patient has to go to the dental clinic every time he tries, which may cause troubles between the patient, the dentist, and the dental technician.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and can arrange an artificial tooth row at a desired position according to an individual patient. It is an object of the present invention to provide a method for manufacturing a denture which can reduce time and a connecting tooth for positioning used for implementing the method.

[0014]

According to the present invention, there is provided a method for manufacturing a denture according to the present invention, comprising the steps of manufacturing a jaw model made of wax, trial-fitting the jaw model in a patient's mouth, and then testing the jaw model. Is taken out of the oral cavity, then a predetermined number of artificial teeth are arranged on the jaw model to form a wax denture, and then, in a method for manufacturing a denture in which the wax portion of the wax denture is replaced with a synthetic resin, At the time of trial, a positioning connecting tooth formed in a shape substantially similar to the dentition of the maxillary anterior teeth is attached to a desired position of the jaw model, and when arranging the artificial tooth on the jaw model taken out from the oral cavity, the positioning connecting tooth is used. It is characterized in that the artificial teeth are arranged while being positioned with reference to the teeth.

Further, the positioning connecting teeth according to the present invention,
It is made of wax, and is characterized in that it is formed in a shape almost similar to the dentition of the upper anterior teeth.

In the present invention, the term "wax" refers to synthetic waxes such as paraffin, animal and plant waxes such as beeswax, and general waxes such as jewelry or dental waxes prepared by blending these. However, it is desirable that the wax used to form the positioning connecting teeth has a color similar to human teeth, such as white or ivory.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a positioning connecting tooth according to an embodiment of the present invention. The positioning connecting tooth 1 has six simulated teeth (middle incisors 2, side incisors 3) corresponding to the upper front teeth. , Two canines 4 each other) are connected to each other to form a shape substantially similar to the dentition of the maxillary anterior teeth.
The positioning connecting teeth 1 are integrally formed using beeswax having a white or ivory color as a whole, and the connecting portions 5 of the adjacent teeth are thinned and easily bent by the connecting portions 5. It is configured as follows.

Next, a method of manufacturing a denture using the positioning connecting teeth 1 will be described in the order of steps. The steps from acquisition of the impression using the impression material to formation of the jaw model 12 are the same as [1] to [4] in the above-mentioned “Conventional Technology”.
The subsequent steps are as follows.

[5 '] A jaw model 12 (upper jaw 12a and lower jaw 12b) similar to that shown in FIG. 7 is trial-fitted in the oral cavity of a patient, and positioning connecting teeth 1 are attached to jaw model 12 as shown in FIG. The center line s of the patient is positioned between the left and right central incisors 2 and 2 and the lower end sides of the central incisors 2 and 2 are substantially overlapped with the mouth angle line k of the patient. Then, the dentist and the patient confirm this state, and for example, the positioning connecting teeth 1
If the tooth row is tilted or displaced up, down, left, or right, it is adjusted to a desired state, and then the jaw model 12 is adjusted.
Is taken out of the oral cavity. The removed jaw model 12 is shown in FIG.
The state is as shown in FIG. In other words, the wax ridge 11a and the wax ridge 11b are pressed against each other by the occlusal force at the time of trial-fitting to form a vertically integrated wax ridge 11c, and the positioning connecting teeth 1 are attached to the front surface of the wax ridge 11c.

[6 '] As shown in FIG. 5, the temporary floor 10a, 1 of the jaw model 12 to which the positioning connecting teeth 1 are attached.
The jaw plaster molds 13a and 13b used to form these temporary beds 10a and 10b are fitted into the temporary bed 10b, respectively, and the jaw model 12 is set on the dental articulator 14 via these plaster molds 13a and 13b.

[7 '] Positioning connecting teeth 1 and wax embankment 1
While appropriately removing 1c, a predetermined number of ceramics, hard resin, etc. (normally 14
) Artificial teeth are embedded and arranged one by one. At this time, first, artificial teeth of maxillary anterior teeth (two incisors, side incisors, and canines, totaling six) are placed on the upper temporary bed 10a, and each tooth is a simulated tooth corresponding to the positioning connecting tooth 1. It is arranged while being positioned so as to be almost the same position as. Next, the upper molars are sequentially arranged outside the left and right canines.
The artificial teeth (front teeth and molars) are arranged on the lower temporary bed 10b while the occlusal relationship with the artificial teeth arranged on the upper temporary bed 10a is improved. When completed, the temporary beds 10a and 10b are removed from the dental articulator 14 and the plaster molds 13a and 13b. As a result, a wax denture in which a predetermined number of artificial teeth are arranged on the temporary beds 10a and 10b made of wax is completed.

The subsequent steps from the trial application of the wax denture into the oral cavity of the patient to the polishing and completion of the denture are the same as [8] to [11] in the above-mentioned "conventional art". Is omitted.

In the method of the present invention as described above, the jaw model 12
In the case where the positioning connecting teeth 1 are attached in a state where the dentition is shifted or tilted up, down, left or right with respect to the mouth angle line k and the median line s, the dentist can easily understand that. Therefore, it can be corrected to a predetermined state at that stage. In addition, if the patient sees the state in which the positioning connecting teeth 1 are attached to the jaw model 12 being tested with a mirror, the patient can grasp the image of the tooth arrangement by using the mirror. You can state that you want it to be raised or that you want the dentition to be tilted up slightly to the right.

Therefore, the position of the dentition of the positioning connecting teeth 1 is confirmed by the patient and the dentist, and after both are satisfied, the jaw model 12 is sent to the laboratory, and the positioning connecting teeth 1 are positioned. Dental technician uses jaw model 1 as standard
If the artificial teeth are arranged in 2, the teeth of the artificial teeth will be arranged at desired positions according to the individual patients, so that there is very little possibility that a problem will occur with respect to the alignment of teeth when trying the wax teeth. Become.

Therefore, it is not necessary to repeat the arrangement of the artificial teeth in the laboratory and the trial application of the wax denture in the dental clinic many times as in the prior art, so that the labor and time required for manufacturing the denture are greatly reduced, and the patient, The risk of trouble occurring between dentists and dental technicians is also eliminated.

Further, since the positioning connecting teeth 1 are made of wax, they can be easily attached to the jaw model 12 made of wax, for example, using a heated iron (paraffin spatula). It is easy to remove, and therefore, it is also possible to easily correct the mounting position of the positioning connecting teeth 1 while keeping the jaw model 12 in the oral cavity of the patient.

Further, the positioning connecting teeth 1 made of wax can be easily cut using a cutter knife or the like. Therefore, when arranging the artificial teeth of the maxillary anterior teeth in the jaw model 12, first, the portion of the central incisor 2 of the positioning connecting tooth 1 is cut off, and the central incisor (artificial tooth) is embedded in the trace, and then Positioning connecting teeth 1
The side incisors 3 are cut off, and the side incisors (artificial teeth) are buried in the traces. In this way, the positioning connecting teeth 1 are partially cut off in accordance with the arrangement order of the artificial teeth. Can work. Therefore, the artificial teeth can be arranged more accurately than when the entire positioning connecting teeth are removed from the jaw model 12 before the artificial teeth are arranged.

In this connection, for example, before treating the dental caries of the maxillary anterior teeth, only the portion corresponding to the dental caries to be treated is cut out of the positioning connecting teeth 1, and the cut part is attached to the dental caries, and the state is passed to the patient through a mirror. It can also be used for the purpose of showing. In this way, the patient can imagine that the black caries became white due to the treatment,
The patient's anxiety can be resolved.

It is needless to say that the technical scope of the present invention is not limited by the above-described embodiment. For example, in the above description, the positioning connecting teeth in the form of connecting the six upper front teeth are shown. Even if the teeth have a shape in which four upper anterior teeth (two central incisors and two lateral incisors) are connected, almost the same can be used.

In the above description, the positioning connecting teeth formed in an arch shape along the dental arch are shown. However, the positioning connecting teeth of the present invention are formed in a straight line using wax and are formed on a jaw model. At the time of attachment, it may be configured to be bent in an arch shape by hand. Furthermore, although the positioning connection teeth made of wax have been described above, the positioning connection teeth other than wax are used.
For example, the method of the present invention can be carried out even with a material such as plastic or silicone rubber.

[0031]

As described above, in the method for manufacturing a denture according to the present invention, positioning teeth are attached to the jaw model at the time of trial, and the artificial teeth are positioned based on the positioning teeth. Since the positioning teeth are attached to the desired positions, the artificial teeth are also positioned at the desired positions according to the individual patients. Will be done. Therefore, for example, a situation in which the arrangement of the artificial teeth in the laboratory and the trial application of the wax denture in the dental clinic are repeated many times can be prevented as much as possible, and the labor and time required for manufacturing the denture can be greatly reduced.

Further, since the positioning connecting teeth according to the present invention are formed by using wax, it is easy to attach and detach to and from the wax-made jaw model. Also, it is possible to easily correct the mounting position of the positioning connecting teeth. In addition, since the artificial teeth can be easily cut using a cutter knife or the like, when arranging the artificial teeth on the jaw model, the artificial teeth can be sequentially embedded while partially removing the connecting teeth for positioning. Can be performed accurately.

[Brief description of the drawings]

FIG. 1 is a front view of a positioning connecting tooth according to the present invention.

FIG. 2 is a bottom view of the positioning connecting teeth as viewed from a lower end side thereof.

FIG. 3 is an explanatory view showing a trial state of a jaw model to which positioning connecting teeth are attached.

FIG. 4 is a perspective view showing a jaw model after trial.

FIG. 5 is a perspective view of a dental articulator in which a jaw model is set.

FIG. 6 is a perspective view of a wax embankment.

FIG. 7 is a perspective view showing a jaw model before trial.

FIG. 8 is an explanatory view showing a trial state of a jaw model in a conventional method.

FIG. 9 is a perspective view showing a jaw model after trial in a conventional method.

[Explanation of symbols]

 1 positioning connecting teeth 12 jaw model

Claims (2)

(57) [Claims] 1. A jaw model made of wax is manufactured, and the jaw model is trial-fitted in the oral cavity of a patient. Then, the jaw model is taken out of the oral cavity. Then, a predetermined number of artificial teeth are arranged on the jaw model to form a wax denture. A method for manufacturing a denture in which the wax portion of the wax denture is replaced with a synthetic resin, when the jaw model is tested into the oral cavity, the positioning connecting teeth formed in a shape substantially similar to the dentition of the upper anterior teeth. Mounting the artificial teeth on a jaw model at a desired position and arranging the artificial teeth on the jaw model taken out of the oral cavity while positioning the artificial teeth based on the positioning connecting teeth as a reference, and manufacturing the artificial tooth. . 2. A positioning connecting tooth made of wax and having a shape substantially similar to the dentition of the upper front teeth.