JP2005177172A - Denture - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve adhesion property of a denture base to the oral cavity surface of a person receiving the denture. <P>SOLUTION: The denture base of a denture 10 is provided with a support base part 14 supporting artificial teeth 12, and a cheek side portion 16a and an inner side portion 16b connected to the outer edge and the inner edge of the support base part 14 respectively and extending along an alveolar ridge. The support base part 14 is formed of a hard resin and the cheek side portion 16a and the inner side portion 16b are formed of a soft resin. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a plate denture.

  Conventionally, resin base dentures and metal base dentures have been used as the base dentures, but acrylic base dentures, which are resin base dentures, are most popular. Resin dentures are prepared as follows. That is, first, (1) taking an intraoral impression of one or both of the upper jaw and lower jaw of a denture user, (2) making a plaster model of the upper jaw and lower jaw from the oral impression, and (3) waxing the plaster model Apply to make wax mold, (4) arrange artificial teeth in wax mold to make wax denture, (5) bury wax denture in gypsum, (6) remove wax, (7) The resin is injected and filled into the cavity formed by the wax removal, (8) after the resin is hardened, the denture and the resin bed are dug out, and (8) polishing and correction are performed to complete the denture.

  In this way, the denture is made so as to conform to the shape of the oral tissue to be mounted. However, it is rare that the denture base, especially its inner surface shape, perfectly matches the shape of the oral tissue, and the denture base surface does not adhere to the oral tissue surface, and the denture wobbles and inhibits sufficient chewing of the user Or may cause detachment of the maxillary denture from the palate. Furthermore, the inner surface of the denture base may be in intensive contact with one point of the oral tissue and give the user discomfort. In order to cope with such problems, an adhesive cream is often used to improve the adhesion of the denture base to the palate, or the entire inner surface of the denture base can be uniformly contacted with oral tissues.

  However, the denture base does not further conform to the shape of the oral tissue due to the changes in the user's oral soft tissue that occur during prolonged denture use. In particular, when using acrylic as a resin denture or a metal denture, the denture base is stiff and the alveolar bone is retracted, and the alveolar ridge is thinned. It can no longer be adapted. In such a case, it is necessary to remake the denture base or perform so-called rebasing in which a flexible resin layer is added to the inner surface of the existing denture base.

  Furthermore, in the case of an upper denture, the denture base has a lid surface portion that covers the entire palate because it is necessary to improve the adhesion between the denture base and the oral tissue so that the denture is not detached. For this reason, problems such as a hard tongue touch when the tongue comes into contact with the lid surface part give the user an unpleasant feeling and the user cannot feel delicious food.

This invention makes it a technical subject to solve the problem of a prior art, and it aims at providing the denture which improved the adhesiveness of the denture base with respect to the oral cavity surface of a wearer.
Another object of the present invention is to improve the feel when the wearer's tongue comes into contact with the lid surface of the upper denture.

  The present invention according to claim 1 is a denture in which artificial teeth are arranged on a denture base, wherein the denture base is connected to a support floor portion that supports the artificial teeth, and an outer edge and an inner edge of the support floor portion, and an alveoli It has a cheek side portion and an inner portion that extend along the bank, the support floor portion is formed of a hard resin, and the cheek side portion and the inner portion are formed of a flexible resin. The dentures are summarized as follows.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
First, referring to FIGS. 1 to 3, an example in which the present invention is applied to a maxillary denture is illustrated. In the present embodiment, the denture 10 is an upper denture or a complete denture, and is connected to a support floor 14 that supports 14 artificial teeth 12 and an outer edge of the support floor 14, and is attached to the user who wears the denture 10. The cheek side portion 16a extending along the outer side surface of the alveolar ridge, the inner side portion 16b connected to the inner edge of the supporting floor portion 14 and extending along the inner side surface of the alveolar ridge, and the inner side portion 16b And a lid surface portion 18 that is connected to the inner peripheral surface and contacts the palate. Preferably, the buccal side portion 16a and the inner side portion 16b are connected to each other along the bearing surface 14a facing the alveolar crest portion in the support floor portion 14. Further, the lid surface portion 18 is formed thinner than the cheek side portion 16a and the inner side portion 16b. In addition, it is preferable to connect the inner side part 16b and the cover surface part 18 so that it may be seamless, and the boundary is not shown clearly in an accompanying drawing.

  In the present embodiment, the support floor portion 14 is formed of a hard material, preferably an acrylic resin or an acrylic resin in which a metal reinforcing member is embedded, and the cheek side portion 16a, the inner side portion 16b, and the lid surface portion 18 are entirely made of a soft material. Preferably, it can be formed from a soft acrylic resin, vinyl resin or silicone. The buccal side portion 16a, the inner side portion 16b, and the lid surface portion 18 are preferably integrally formed of the same material. Moreover, the support floor part 14 may embed a metal member as a reinforcement member.

  According to the present embodiment, since the cheek side portion 16a and the inner side portion 16b are formed of a soft material, the adhesion between the denture base and the alveolar ridge is enhanced, and the wobbling and detachment of the denture 10 can be prevented. In particular, by forming the cheek side portion 16a from a soft material, it becomes possible to conform to the overhanging shape of the portion adjacent to the midline of the alveolar ridge. Further, by connecting the cheek side portion 16a and the inner side portion 16b to each other along the support surface 14a of the support floor portion 14, the alveolar ridge crest is prevented from contacting the support surface 14a made of a hard material, and the alveolar bone Regression can be prevented or reduced. Further, by forming the lid surface portion 18 from a soft material, it is possible to improve the adhesion between the lid surface portion 18 and the palate, and the touch when the user's tongue comes into contact with the lid surface portion 18 is natural. It becomes. Furthermore, by forming the cover surface portion 18 as thin as possible, the adhesion is further enhanced and the touch is natural.

  4 and 5, an example in which the present invention is applied to a lower denture is shown. In the present embodiment, the denture 20 is a mandibular denture or a partial denture, and is connected to the support floor 24 that supports the 14 artificial teeth 22 and the outer edge and the inner edge of the support floor 24, similarly to the upper denture 10. It has a cheek side portion 26a and an inner portion 26b extending along the outer side surface 28a and the inner side surface 28b of the alveolar ridge 28 of the wearer. Preferably, the cheek side portion 26a and the inner side portion 26b are connected to each other along the bearing surface 24a facing the alveolar crest portion 28c in the support floor portion 24.

  In the present embodiment, the support floor 24 is made of a hard material, preferably acrylic resin or acrylic resin with a metal reinforcing member embedded therein, and the cheek side portion 26a and the inner side portion 26b are entirely made of a soft material, preferably soft. It can be formed from acrylic resin, vinyl resin or silicone. The buccal side portion 26a and the inner portion 26b are preferably integrally formed of the same material. Moreover, the support floor part 24 may embed a metal member as a reinforcing member.

  According to the present embodiment, since the cheek side portion 26a and the inner side portion 26b are formed of a soft material, the adhesion between the denture base and the alveolar ridge 28 is enhanced, and wobbling and detachment of the denture 20 can be prevented. . In particular, by forming the cheek side portion 26a from a soft material, it is possible to adapt to the overhanging shape of the portion adjacent to the midline of the alveolar ridge 28. Further, by connecting the cheek side portion 26a and the inner portion 26b to each other along the support surface 24a of the support floor portion 24, the alveolar crest portion 28c is prevented from contacting the support surface 24a made of a hard material, and the alveolar bone Can be prevented or reduced.

1 is a perspective view of a maxillary denture according to a preferred embodiment of the present invention. It is a top view of the upper denture of FIG. It is sectional drawing which follows the arrow line III-III of FIG. 1 is a perspective view of a mandibular denture according to a preferred embodiment of the present invention. FIG. 5 is a cross-sectional view taken along line VV in FIG. 4.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Maxilla denture 12 ... Artificial tooth 14 ... Support floor part 16a ... Cheek side part 16b ... Inner part 18 ... Lid surface part 20 ... Maxilla denture 22 ... Artificial tooth 24 ... Support floor part 26a ... Cheek side part 26b ... Inner part 28 ... Alveolar ridge

Claims (5)

In dentures made by arranging artificial teeth on the denture base,
The denture base has a support floor portion that supports the artificial teeth, and a buccal side portion and an inner portion that are connected to the outer edge and the inner edge of the support floor portion and extend along the alveolar ridge,
The denture according to claim 1, wherein the support floor is made of a hard resin, and the cheek side and the inner part are made of a flexible resin.   The denture according to claim 1, wherein the support floor is formed of a hard acrylic resin, and the material forming the cheek side and the inner side is selected from the group consisting of a soft acrylic resin, a vinyl resin, and silicone.   The denture according to claim 1 or 2, wherein the denture is an upper denture, and further includes a lid surface portion connected to the inner portion and formed of a flexible resin.   The denture according to claim 3, wherein the lid surface portion is made of the same material as the inner portion.   The denture according to any one of claims 1 to 4, wherein the cheek side portion and the inner side portion are connected to each other along a support surface of the support floor portion and attached to the support surface.

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