JPS6058861B2 - denture retainer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a denture retaining device for attaching a denture to remaining teeth.

There are various ways to attach dentures, but at least one
When a tooth with solid dentine or more remains, a method is adopted in which a denture is attached to the remaining tooth via a retainer.

By the way, conventionally, the above-mentioned maintenance method has been to place a clasp (hook) on the crown of the tooth if it is healthy, or to properly treat the crown of the tooth if it is in contact with the tooth, to set a metal crown, etc. A clasp is placed on top of the denture to maintain the denture, but it is not functionally compatible and the gold crown and clasp appear on the outside, making the face unsightly.

In order to solve the drawbacks of the conventional denture maintenance method, the present invention aims to solve the problems of the conventional denture maintenance method, and to solve the problem of tooth decay, where the tooth cannot be saved without a gold crown or the like, or where the tooth needs to be extracted. To provide a denture maintenance device that preserves a tooth and provides a more compatible denture when the root of the tooth is well grafted onto the jawbone.

The feature of this is that the inner crown has a split at the tip, which has legs that are attached to the root canal of the remaining tooth.
The outer crown, which is integrated with the denture, elastically fits to eliminate the instability of the denture, and by providing a protective plate between the inner crown and the leg to cover the root surface, the denture retaining device itself The present invention provides a denture maintenance device which aims at the stability of the denture and prevents secondary erosion of the root surface by covering the root surface with a protective plate using an adhesive.

Next, the denture maintenance device according to the present invention will be explained with reference to the drawings.

As shown in FIG. 1, the denture maintenance device A includes a cylindrical inner crown 1 that fits with the denture outer crown 6 described below, a protection plate 3 that covers the root surface, and a leg portion 4 that is attached to the root canal 8. The inner crown 1 is provided with a split 2, and a substantially annular split 5 is provided at the connection portion of the inner crown 1 with the protection plate 3.

Next, a method for manufacturing the denture maintenance device A will be described.

First, the inner crown 1 having the split 2, the leg portion 4' having a smaller diameter and shorter than the average root canal, and the cut portion 1? The material B having the following is integrally manufactured by a casting method.

Then, the leg portion 4' of material i is inserted into the root canal 8 of the remaining tooth 7, which has been completely processed to form a flat root surface 9, and the length and outer diameter of the leg portion 4' are the same. After confirming whether it fits the root canal 8, the material B is once removed and a softened inlay wax (hereinafter referred to as wax) 11 is placed on the root surface 9. Thereafter, the suitably heated leg portion 4'' of the material B is inserted into the root canal 8, and the wax 11 is formed to cover the upper part of the root surface 9, thereby forming a wax pattern 12.

In this case, the wax 11 will also fill the gap between the leg 4'' and the root canal 8. Next, the heated sprue wire 13 is inserted into the wax pattern 12 through the cutout 10 (the fourth (See figure).When the wax has sufficiently cooled and hardened, the material B1 wax pattern 12 and sprue wire 13 are removed from the root surface 9 and buried in the mold, and the mold is heated. Then, by incinerating the wax and injecting molten metal of the same type as the material B into the created cavity using the hole of the sprue wire 13 as a sprue, a leg portion 4 that is almost equal to the protection plate 3 and the root canal 8 is formed in the material B. This is a denture maintenance device A having the following.

The outer crown 6 is tightly fitted into the inner crown 1 of the denture maintenance device A obtained in this manner by utilizing the elasticity of the split 2.

Then, the legs 4 of the denture maintenance device A are attached to the root canal 8, an impression of the entire oral cavity for the required denture 14 is taken and a model is made, and the denture with the outer crown 6 built in is installed using a known method. create. On the other hand, the leg portion 4 is inserted into the root canal 8 of the remaining tooth 7, and
; The denture maintenance device A is attached to the remaining tooth 7 by bonding the protective plate 3 with an adhesive so as to cover the root surface 9.

Thereafter, by fitting the outer crown 6 to the inner crown 1, the denture 14
All you have to do is attach the . As is clear from the above explanation, according to the denture maintenance device of the present invention, since the inner crown is provided with a split, when the outer crown is fitted, the outer diameter of the inner crown is slightly reduced, making the denture elastic. It can be installed stably in bondage.

Therefore, by removing and cleaning the denture, the inside of the oral cavity can be kept clean. In addition, secondary erosion of the root surface is prevented because the protective plate covers the root surface and the root surface is not exposed, and the denture retainer itself can be stably attached to the remaining tooth. , the practical effects are extremely large. Although the denture maintenance device does not necessarily need to be provided with an annular split, the provision of the annular split has the effect that the inner crown can be easily bent.

[Brief explanation of the drawing]

Fig. 1 is a front view of the denture retaining device of the present invention, Fig. 2 is a cross-sectional view of the material covered with an outer crown, and Fig. 3 is a - - - - of Fig. 2.
A line sectional view, FIG. 4 is an explanatory view at the time of creating a wax pattern, and FIG. 5 is a partial sectional view with a denture attached. A: Denture maintenance device, 1: Internal crown, 2
...Split, 3...Protection plate, 4.
... Legs, 6 ... Outer crown, 7 ...
Remaining tooth, 8...Root canal, 9...Root surface.

Claims (1)

[Claims] 1 Leg parts for attaching a denture maintenance device that attaches an outer crown integrally provided with a denture to the remaining tooth into the root canal of the remaining tooth; and an inner crown part provided with a split to elastically hold the outer crown. and a protective plate that is located between the leg portion and the inner crown portion and covers the root surface of the tooth.