JPH0422356A - Artificial tooth - Google Patents

Abstract

PURPOSE:To protect sound teeth, shorten the treatment period, and liberate from uncomfortable sense by providing a fitting part on the body of an artificial tooth or a support to support it, and thereby enabling fitting on surviving teeth on both sides of the body of artificial tooth or at the outside of the artificial tooth. CONSTITUTION:An artificial tooth 1 is equipped with a fitting piece 5 formed by folding into channel-shaped side view consisting of a front part 11a, tooth face part 11b, and rear part 11c and formed from a shape memory alloy in a single piece. The fitting piece 5 consists of a lefthand surviving tooth fitting part 4a, artificial tooth body holding part 5s. and righthand surviving tooth fitting part 4b. Fitting of the piece 5 is made by heating so as to open the front part 11a and rear part 11c outward, and after fitting, restitution is made to the memory position. As a result, the fitting piece 5 is fixed with the fitting parts 4a, 4b pinching surviving teeth Ha, Hb, and the body 2 of the artificial tooth fills the missing part S.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a denture that compensates for missing teeth.

[Prior art and issues]

Conventionally, when there are healthy surviving teeth on both sides of the missing tooth, a so-called bridge denture has been used to compensate for a missing tooth.

A bridge uses surviving teeth on both sides as abutment teeth. The abutment teeth are made smaller by scraping their outer tooth structure, and the denture side has a pair of attachment parts that cover the abutment teeth and each attachment part. A denture main body located between the two is integrally formed, and when the denture is worn, each attachment part of the denture is fitted into the abutment tooth and further fixed with an adhesive.

However, such conventional dentures had the fatal drawback that it was necessary to remove a considerable amount of the abutment teeth, and in some cases, the tooth pulp was damaged, causing damage to healthy teeth.

The present invention aims to provide a denture that solves the problems existing in the prior art.

[Means to solve the problem]

The denture 1 according to the present invention has a denture main body 2 or a support 3 that supports the denture main body 2, and living teeth H located on both sides of the denture main body 2.
It is characterized by providing fitting parts 4a and 4b that can be fitted to the outside of the parts a and Hb. In this case, the fitting parts 4a and 4b are integrally formed of, for example, a shape memory alloy, and are provided with a fitting body 5 formed in a U-shape on the side that can be clamped onto each of the remaining teeth Ha and Hb. The denture main body 2 can be provided in the middle part of the fitted body 5. In addition, the denture main body 2 is constituted by a front half body 2f and a rear half body 2r which are divided into two parts in the front and back, and are configured to be connectable via the positioning part 6, and each living tooth is attached to the side surface of the front half body 2f and the rear half body 2r. It can be constructed by providing fitting parts 4a and 4b that can be fitted on the side surfaces of Ha and Hb. Furthermore, the denture main body 2 may be provided with engaging pieces 7a and 7b on both sides thereof that engage with the surfaces of the surviving teeth Ha and Hb.

[For production]

According to the denture l according to the present invention, the fitting parts 4a and 4b provided on the denture main body 2 or the support body 3 that supports the denture main body 2 are connected to the living teeth Ha and Hb located on both sides of the denture main body 2.
The denture main body 2 is fixed in place, and the missing part is compensated for.

〔Example〕

Next, preferred embodiments of the present invention will be described in detail based on the drawings.

(First Example) First, regarding the denture 1 according to the first example, FIGS.
This will be explained with reference to the figures.

In FIG. 1, HalHb indicates a healthy surviving tooth, and the defective part S between them indicates a state in which one tooth is missing.

The denture 1 according to the first embodiment includes a front part 11a, a tooth surface part 11
b. The fitting body 5 is provided with a rear surface portion 11c, which is bent into a U-shape on three sides. This fitting body 5 is integrally formed of a shape memory alloy. Furthermore, the fitting body 5 is divided into three blocks in the left-right direction, and consists of a living tooth fitting part 4a on the left side, a denture main body holding part 5s, and a living tooth fitting part 4b on the right side. Each living tooth fitting part 4U, 4b is formed in a shape that can be fitted to each living tooth Ha, Hb, and the denture main body holding part 5s is formed into a shape that can be fitted to each living tooth Ha, Hb.
support.

Therefore, when attaching the fitting body 5, as shown in FIGS. 1 and 2, the fitting body 5 is heated to heat the front part 11a.
3 and 4 after installation.
Return to the storage location shown in the figure. As a result, the fitting body 5 is fixed by the fitting parts 4a, 4b sandwiching the surviving teeth Ha, Hb, and the denture main body 2 compensates for the missing part S. In order to set the height, a hole is formed in the tooth surface portion 11b of each fitting portion 4a, 4b, so that the surviving teeth Ha, Hb
The upper surface of the tooth surface portion 11b may be exposed so as to match the height of the tooth surface portion 11b.

(Second Example) Next, regarding the denture 1 according to the second example, FIGS.
This will be explained with reference to the figures.

The denture 1 according to the second embodiment is composed of a front half 2f and a second half 2r, which are obtained by dividing the denture main body 2 into two in the front and back, and the two are joined together when worn. The side shape of each half-rest 2f, 2r is formed to be the same so as to match the side shape of the surviving teeth HaSHb located on both sides. In this case, the surviving tooth H
The side surfaces of a and Hb have a curved shape, and the width at the root side is narrow, so when installed, the side surfaces of each half 2f and 2r are fitted and fixed on the side surfaces of surviving teeth Ha and Hb, respectively. Fitting portions 4a and 4b are configured. Also, the front half 2
Positioning portions 6 are provided on f and the rear half 2r. That is, protrusions 12a and 12b are provided on the opposing surface of the front half body 2f, and holes 13a and 13b into which the protrusions 12a and 12b are inserted are provided on the opposing surface of the rear half body 2r. Note that the protrusion 1
2a... (hole portions 13a...) are formed downward at the tips, and may be provided with a taper if necessary. In addition, the protrusion 12
A protruding piece 14 is integrally formed at the upper end of the front half body 2f having a..., and a recess 15 into which the protruding piece 14 fits is provided at the upper end of the rear half body 2r.

Therefore, when mounting, the halves 2f and 2r are brought together from the front and back, respectively, as shown in FIG. 6, and joined using adhesive. In this case, if necessary, it may be configured to be detachable by press-fitting.

(Third Example) Next, a denture l according to a third example will be described with reference to FIGS. 1O to 111K.

Similar to the second embodiment, the denture 1 according to the third embodiment is provided with fitting parts 4a and 4b on both sides of the denture main body 2, which can be fitted onto the sides of each surviving tooth HaSHb. Further, on both sides of the denture main body 2, engaging pieces 7a that engage with the back surfaces of the living teeth Ha and Hb,
7b is provided integrally. The engagement piece 7a17b is a living tooth Ha,
Cover almost the entire back side of Hb. And this engagement piece 7a
, 7b are bonded to each surviving tooth Ha, Hb as necessary.

In this embodiment, the engaging pieces 7a, 7b are used as living teeth Ha...
12 and 13.
As shown in the figure, the engaging pieces 7a, 7b are connected to the surviving teeth Ha...
It may be provided on the tooth surface (upper surface) side.

In this case, it is desirable that the engaging pieces 7a, 7b be accommodated in the recesses 8a, 8b in the intermediate portions of the upper surfaces of the surviving teeth Ha, Hb. Note that in FIGS. 12 and 13, the same parts as in FIGS. 10 and 11 are given the same reference numerals.

Although the embodiments have been described in detail above, the present invention is not limited to such embodiments, and the detailed configuration,
The shape, material, etc. can be arbitrarily changed without departing from the gist of the present invention.

〔Effect of the invention〕

As described above, the denture according to the present invention is provided with a fitting part that can be fitted onto the outside of the living teeth located on both sides of the denture main body, on the denture main body or the support body that supports the denture main body. There is no need to grind at all, and the harmful effects of damaging the remaining teeth are eliminated. As a result, not only healthy teeth can be completely protected, but also the period of dental treatment can be shortened, and the patient can be relieved from the discomfort associated with the treatment, which is a remarkable effect.

[Brief explanation of drawings]

Fig. 1: Front view of the denture according to the first embodiment of the present invention before being fitted, Fig. 2: Side view of the same, Fig. 3 Front view of the same denture after being fitted, Fig. 4: Side view of the same, Fig. 5: A perspective view from below before wearing the second denture; Fig. 6: A plan view before wearing the denture according to the second embodiment of the present invention; Fig. 7: A plan view after wearing the second denture. , Fig. 8: Front view of the same, Fig. 9: A sectional view taken along the line A-A in Fig. 8, Fig. 10: A plan view after the denture according to the third embodiment of the present invention is installed, Fig. 11: The same Rear view, FIG. 12: A plan view after the denture according to a modified example of the third embodiment is installed, and FIG. 13: A rear view of the same. In the drawing, l: denture 2: denture body 2f: front half
2r: Half body 3: Support body 4a
, 4b: Fitting portion 5: Fitting body 6: Positioning portions 7a, 7b: Engagement pieces Ha, Hb: Survival teeth chart Fig. 4 Fig. 4 Fig. Fig. Fig. 9 Fig. 0 Figure Figure Figure Figure

Claims (1)

[Scope of Claims] [1] A denture characterized in that a denture main body or a support that supports the denture main body is provided with a fitting portion that can be fitted to the outside of living teeth located on both sides of the denture main body. . [2] It is characterized by being integrally formed of a shape memory alloy and having a fitting body formed in a U-shape on the side that can be clamped onto each surviving tooth, and a denture main body is provided in the middle part of the fitting body. The denture according to claim 1. [3] The denture main body is composed of a front half body and a half half body that are divided into two parts in the front and back, and is configured so that they can be connected via a positioning part. 2. Denture according to claim 1, characterized in that it is provided with a possible fitting part. [4] The denture according to claim 1, characterized in that engaging pieces that engage with the surfaces of each living tooth are provided on both sides of the denture main body.