WO2005087131A1

WO2005087131A1 - Plate denture containing metal member

Info

Publication number: WO2005087131A1
Application number: PCT/JP2004/003182
Authority: WO
Inventors: Kazuo Wakabayashi; Shigeru Yoshino
Original assignee: Showa Yakuhin Kako Co., Ltd.
Priority date: 2004-03-11
Filing date: 2004-03-11
Publication date: 2005-09-22

Abstract

A plate denture, comprising at least one artificial tooth and a plate denture base supporting the artificial tooth, the plate denture base further comprising a recessed part engaged with the residual ridge of a wearer, characterized in that the surface of the recessed part is partly formed of a metal member.

Description

BACKGROUND OF THE INVENTION

The present invention relates to dentures (local dentures and full dentures), and more particularly to dentures suitable for mounting on patients who cannot implant, and more specifically, the disadvantages of conventional dentures. In other words, it can effectively prevent bone resorption, improve the user's wearing, putting on and taking off and mastication problems, and effectively protect and apply the oral mucosa. Regarding dentures.

In general, loss of teeth results in poor chewing during eating, which can cause indigestion and even change the appearance of the face. In addition, teeth play an important role in satisfying one of the three major desires of humans, appetite, and are even said to form a space that balances the skull and posture of the human body. ing. Thus, loss of teeth can have various undesirable disadvantages. Thus, for example, dental implants (artificial roots), devices that are designed to be surgically inserted into or on the maxilla and mandible to support the dental prosthesis superstructure Embedding is being developed.

However, dental implants can be implanted in patients when, for example, there are few jaw ridges in the oral cavity, when there are difficulties in hemostasis, when there is little saliva secretion, or when there is radiation damage due to oral cancer or the like. It is considered impossible. When implant surgery is not possible, instead of implanting a denture stabilizer directly into the patient's mucosa, a denture base that can be attached to and detached from the wearer's jaw ridge uses a denture supporting artificial teeth. It is suggested that they be used.

Thus, when the operation of the dental implant is not possible, , Dentures) are often used. Conventionally, artificial dentures that support artificial teeth with denture base made of acrylic resin or the like have been used.However, because the denture base is hard, delicate adjustment is difficult, and it may be inappropriate. Many, e.g., painful, unable to masticate, dislodged when opening mouth, easy to enter food between denture base and oral mucosa, causing pain during chewing and hygiene problems There were drawbacks, such as gains, and often hindered comfortable eating habits. It was also said that a denture base made of a hard acrylic resin was too stimulating for the oral cavity, for example, the surface of the ridge.

For this reason, denture structures have been developed that minimize the burden on the denture base and mucosal surface of the denture base.For example, the denture does not impose a burden on the remaining teeth, periodontal tissue, etc. As described above, a tooth device using a soft material as a soft backing material has been disclosed (for example, see Japanese Patent Application Laid-Open No. 2000-289798).

In addition, by using a mixture of acrylic resin and a soft material in a dental molded product, the durability of the denture base (medium acrylic resin) and the soft material can be improved by increasing the adhesiveness. (See, for example, Japanese Patent Publication No. 7-242 and Japanese Patent Publication No. 7-53644).

However, in dentures where the soft material is in direct contact with the oral ridge and mucous membrane, the bone resorption progresses and the pain increases as the stimulus (pressure) to the ridge and mucous membrane is too low by use. The problem has arisen. This makes chewing difficult not only for hard foods, but also for soft foods, which may lead to indigestion.

In addition, flexible materials often have problems in adhesiveness to various materials, and therefore, the materials used in combination with these materials have been limited. For example, silicone rubber, which is a soft material, has low adhesion to metal, making it difficult to use metal as a material for denture bases and the like, and further improvement in durability is required.

Improve the feeling of wearing, the difficulty of coming off, and the feeling of oppression for all dentures. There is a further need for effective protection of the oral mucosa. Disclosure of the invention

The present invention has been achieved in order to solve the above-mentioned problems, and is suitable for use in patients who cannot perform dental implant surgery. Efficiently prevent problems with dentures, ie, bone resorption, further improve the user's wearing, putting on and taking off and mastication problems, and effectively protect the oral ridge and mucous membrane. It is another object of the present invention to increase the durability of the denture.

The present invention is based on the finding that the above problem can be overcome by introducing a metal member into a denture base in a specific form in a denture base.

That is, in the first aspect, the present invention provides a denture having at least one artificial tooth and a denture base supporting the artificial tooth,

The dental prosthesis is characterized in that the denture base has a concave portion that engages with the ridge of the wearer, and a part of the concave surface is made of a metal member.

In a second aspect, the present invention provides a denture having at least one artificial tooth and a denture base supporting the artificial tooth,

A first floor member made of an acrylic resin, wherein the denture base directly contacts and supports a part of the surface of the artificial tooth; and an acrylic system which directly contacts a part of the surface of the first floor member. A second floor member made of a mixture of a resin and a rubber material; a second floor member supporting the first floor member via the second floor member, having a recess for engaging a chin ridge of a wearer; It consists of three floor members,

Provided is a denture with a floor, wherein a part of the concave surface is made of a metal member. Brief Description of Drawings

FIG. 1 shows one embodiment of a cross-sectional view of a denture with a denture of the present invention.

FIG. 2 shows one embodiment of a cross-sectional view of a denture with a bed according to the present invention.

FIG. 3 shows one embodiment of a cross-sectional view of a denture with a bed of the present invention.

FIG. 4 shows one embodiment of a cross-sectional view of a denture with a bed according to the present invention.

FIG. 5 shows an embodiment of a cross-sectional view of a denture with a bed according to the present invention.

Figure 6 shows the centerline of the ridge.

FIG. 7 shows a metal member that can be used in the present invention.

FIG. 8 shows a metal member that can be used when manufacturing a maxillary denture in the present invention.

FIG. 9 shows an embodiment of a cross-sectional view of an upper denture with a maxillary prosthesis manufactured using the metal member shown in FIG.

FIG. 10 shows an example of a cross-sectional view of an upper denture for a maxilla of the present invention.

FIG. 11 shows an example of a cross-sectional view of a lower denture for a lower jaw according to the present invention.

Fig. 12 shows a denture with a lower jaw (completed view) according to the present invention.

FIG. 13 shows an upper denture with a maxillary denture (completed view) according to the present invention.

Reference numeral 1 indicates an artificial tooth.

Reference numeral 2 indicates a denture base.

Reference numeral 3 denotes a denture engaging recess of the denture base.

Reference numeral 4 indicates a metal member.

Reference numeral 5 indicates one end of the metal member.

Reference numeral 6 indicates the other end of the metal member.

Reference numeral 7 denotes a first floor member.

Reference numeral 8 indicates a second floor member.

Reference numeral 9 indicates a third floor member. Reference numeral 10 indicates the center line of the ridge.

Reference numeral 11 indicates the end of the ridge.

Reference numeral 12 indicates a traversing line.

Reference numeral 13 indicates a thin metal plate.

Reference numeral 14 indicates a mesh part. BEST MODE FOR CARRYING OUT THE INVENTION

First, in this specification, the term "covered denture" refers to a denture with a denture base that is in direct contact with the oral mucosa in order to artificially recover the functional and esthetic changes caused by the loss of one or more teeth. Means In addition, the dentures include both upper dentures and lower dentures.

“Artificial tooth” means a tooth artificially made as a substitute for a natural tooth. As artificial teeth, for example, ceramic teeth, resin teeth, and in some cases, metal teeth can be used. These are made in a conventional manner in relation to the missing and possibly remaining teeth, anatomically and functionally similar to natural teeth in terms of morphology, color, gloss, size, etc. be able to. In the present invention, there is no particular limitation as long as the denture has at least one artificial tooth. For example, it is preferable to have two or more artificial teeth, and more preferably, nine or more artificial teeth. And even more preferably 14 artificial teeth. These artificial teeth are preferably adjacent to each other along the center line of the denture wearer's ridge. Further, in the present invention, it is preferable to select the artificial teeth for the upper jaw when creating the denture for the upper jaw, and to select the artificial teeth for the lower jaw when creating the denture for the lower jaw. In the case of using a plurality of artificial teeth, the direction and spacing of the artificial teeth can be appropriately determined by a conventional method in consideration of the type, position, color tone, size, etc. of the artificial teeth required by the wearer.

In the first aspect of the present invention, the “denture base” is a part of a denture having a denture, Has a concave portion (hereinafter, referred to as a concave portion for engaging the ridge) which can be engaged with the ridge and mucous membrane of the wearer, and a part of the concave portion for engaging the ridge is a metal member. Consists of The denture base is preferably formed by bonding an acrylic resin and a rubber-like substance. At this time, the acrylic resin and the rubber-like substance may be directly bonded to each other, but may be bonded to each other by using an adhesive such as a primer or a bonding liner. .

Further, in the first aspect of the present invention, a part of the denture base engaging concave surface of the denture base is formed of a metal member. Preferably, the metal member has one end in the denture base, and the other end has a shape that constitutes a part of the concave surface for jaw ridge engagement. The metal member is preferably a metal selected from the group consisting of gold, silver, cobalt chromium alloy, gold alloy, silver alloy, gold 'silver' palladium alloy, titanium, platinum alloy, nickel chromium alloy and stainless steel. Should be included.

Hereinafter, the first embodiment of the present invention will be described more specifically with reference to the drawings, but the present invention is not limited thereto.

FIG. 1 shows a cross-sectional view of a denture with a denture according to the present invention. The artificial tooth 1 is supported by a denture base 2 directly contacting a part of its surface. The denture base 2 has a recess 3 for ridge engagement. Part of the three surfaces of the recess for engaging the ridge is constituted by a part 6 of the metal member 4. The metal member 4 has one end 5 in the denture base 2, and the other end 6 is exposed from the jaw ridge engaging recess 3, and constitutes a part of the jaw ridge engaging recess 3, that is, the denture base. It extends from inside 2 without facing the artificial tooth 1 directly, facing the artificial tooth.

Here, the shape and size of the other end 6 can be appropriately determined in consideration of the intraoral ridge, the shape and size of the mucous membrane of the wearer, and the like. In addition, it is preferable that the other end 6 is designed so as to directly contact the intraoral ridge and mucous membrane of the wearer, but it is preferable that the wearer does not feel pain through the other end 6. Desired. For this reason, for example, the shape of the other end 6 of the metal member that directly contacts the oral cavity ridge of the wearer is Intraoral ridge of the wearer 'Adjust appropriately considering the shape and size of mucous membrane, for example,

It is required to have a curved shape like 1 and / or to adjust the distance from one end 5 to the other end 6 of the metal member (hereinafter, referred to as “length of metal member”). Maybe. Incidentally, by adjusting the length of the metal member, for example, the denture of the present invention can have the cross section shown in FIG.

The distance extending in the direction perpendicular to the "length of the metal member" (hereinafter referred to as "thickness of the metal member") is required for the durability of the entire denture or the denture base layer and the wearer. It can be appropriately set in consideration of the size of the denture to be used, the type of metal used, and the like. More specifically, the “length of the metal member” can be, for example, up to 6 mm, and is preferably, for example, 1 to 5 mm. On the other hand, the “thickness of the metal member” can be, for example, 2 to 6 mm, and preferably 3 to 5 mm. The “length of metal member” and “thickness of metal member” may be appropriately determined according to the type of artificial tooth used, the type of metal used, the size of the denture required for the wearer, the size of the ridge, etc. It is preferable to set, but there is essentially no change depending on the number of artificial teeth.

Note that, regarding the embodiment in FIG. 1, an overall view of the metal member 4 in the case of a complete denture is shown in FIG.

Further, in the second aspect of the present invention, the “denture base” is in direct contact with at least three layers of the first floor member, the second floor member, and the third floor member, that is, a part of the surface of the artificial tooth. A first floor member made of an acrylic resin to be supported, a second floor member made of a mixture of an acrylic resin and a rubber-like substance, which directly contacts a part of the surface of the first floor member, and a second floor A third floor member made of a rubber-like material, which supports the first floor member via the member, and has a concave portion for engaging the chin ridge of the wearer. Here, a so-called backing layer may be further provided, or a so-called stabilizing agent may be applied to the recess for engaging the chin ridge, or fixed using a crasp. The recess is the intraoral ridge of the wearer It is preferable that the denture of the present invention be stabilized by directly contacting and engaging with the mucous membrane, thereby stabilizing the ridge and mucous membrane of the wearer.

As the acrylic resin constituting the first floor member, an acrylic resin for a denture base, in particular, a resin which is generally commercially available as a heat-polymerizable resin of a powder-liquid mixture type can be used. Specifically, acrylic resin includes methyl acryl resin. Specific examples of these include polymethyl methacrylate and methyl methacrylate. Also, acrylic resin

, Small amounts of various additives, for example, crosslinking agents such as ethyl methacrylate (EDMA), pigments such as iron sesquioxide (bengala) and titanium oxide, and polymerization catalysts such as benzoyl peroxide and hydroquinone. Good. Further, the polymethyl methacrylate mentioned as the above example may be a homopolymer having methyl methacrylate as a monomer, but may be another monomer, for example, a vinyl monomer, for example, an alkyl acrylate (for example, methyl acrylate). It may be an alkyl methacrylate other than methyl methacrylate, or a copolymer with ethylene glycol dimethacrylate. These monomer ratios should be considered in consideration of the operability during denture preparation or in consideration of the properties of the denture base, such as bending strength, flexural modulus, bending deflection, water absorption, mechanical strength, plasticity and dissolution. It is better to determine as appropriate.

The amount of the first floor member used can be appropriately determined in consideration of the number of artificial teeth, the size required for a denture, and the like.However, when the number of artificial teeth is one, 0.5 to 0.5 is used. g, and if the number of artificial teeth is 14, the weight can be 8 to 10 g.

The types and amounts of these acrylic resins can be the same for the acryl resins that can be used in the first embodiment.

The second floor member is composed of a mixture of the acrylic resin and a rubber-like substance. In this mixture, the ratio of the acrylic resin to the rubber-like substance is expressed by mass ratio, for example, 1: 9 to 9: 1. Preferably, the ratio is determined to be 2: 8 to 8: 2. The mixing (kneading) of the acrylic resin and the rubbery substance is preferably performed, for example, on a kneaded paper using a spatula until both are uniformly mixed. By the above mixing ratio and / or mixing operation, the adhesiveness between the second floor member (a mixture of acrylic resin and rubber-like substance) and the first floor member (acrylic resin), and the second floor member And the third floor member (rubber-like substance) can have good adhesiveness. Further, the adhesiveness when the second floor member and the metal member are in contact with each other may be considered.

The amount of the second floor member to be used can be appropriately determined in consideration of the number of artificial teeth, the size required for a denture, and the like. The weight can be 15 g, and if the number of artificial teeth is 14, the weight can be 1 to 2 g.

Note that, similarly to the above, in the first embodiment, the acrylic resin and the rubber-like material can be bonded.

The third floor member in the present invention is made of a rubber-like substance. The third floor member supports the first floor member via the second floor member. That is, the third floor member supports the first floor member via the second floor member, rather than directly contacting the first floor member. This is in consideration of the fact that the adhesion of the third floor member to the second floor member is good, but changes within a range where the desired adhesion is obtained, for example, the third floor member and the third floor member This does not preclude changes to settings where one floor member makes direct contact at low levels.

Further, the third floor member has a recess for engaging the ridge. The denture with a denture according to the present invention can improve the fit feeling of the wearer to the jaw ridge by having such a ridge engaging portion in the third floor member, and the denture stomatitis due to being soft. The pain due to direct contact can be suppressed. It is preferable that such a recess for engaging the ridge is appropriately adjusted in consideration of the size and shape of the ridge of the wearer, and such adjustment is performed by a conventional method, for example, in the mouth of the wearer. Insert, central occlusal position is sufficient After performing a series of functional movements, the patient can be taken out of the oral cavity and trimmed using scissors, a knife, etc. In addition, a part of the concave surface for ridge engagement is made of a metal member.

As the rubber-like substance, it is preferable to select a substance having high biocompatibility. For example, a silicone rubber, more specifically, an addition-reaction-type silicone rubber (for example, a rubber having a vinyl group having both ends blocked with a vinyl group). An organopolysiloxane, an organohide phenolic polysiloxane, and the like, a radical reaction-curable silicone rubber (for example, a diorganopolysiloxane having a vinyl group, etc.), and a condensation reaction hardened silicone rubber can be used. Further, the third floor member may be made of one kind of rubbery substance, or may be made of two or more kinds of rubbery substance. In addition, the rubber material of the third floor member has a hardness such that a desired characteristic can be obtained, for example, 10 to 80 in JIS-A hardness, especially 20 to 80 or JIS-K6301. It preferably has a hardness of 20 to 70, especially 30 to 50. Further, the properties of the rubber-like substance such as tensile strength, compression elastic modulus, water absorption, and dissolution rate can be appropriately set in consideration of the properties required for the obtained third floor member. Further, the third floor member may include a coloring agent for making the appearance similar to the gum, or may include other various additives such as a filler. In the present invention, as the rubber material for the third floor member, for example, a trade name of CF 505 manufactured by Toray Dow Corning Silicone Co., Ltd. and a trade name of KE-195 manufactured by Shin-Etsu Chemical Co., Ltd. 0—70 (A-B) can be used. .

The amount of the third floor member to be used can be appropriately determined in consideration of the number of artificial teeth, the size required for a denture, and the like.However, when the number of artificial teeth is one, 0.7 to 1. The weight can be 0 g, and when the number of artificial teeth is 14, the weight can be 10 to 15 g.

The types and amounts of these rubbery substances can be used in the first embodiment. The same can be applied to the rubber-like substance.

In the second aspect, the “metal member” is a member made of metal and constitutes a part of the concave surface for jaw ridge engagement. Preferably, the metal member has one end in the first floor member, and the other end has a shape forming a part of the concave surface for jaw ridge engagement. Thus, in one embodiment, for example, the metal member having such a shape can reinforce the entire denture of the present invention, in particular, the denture base made of the three-member member.

Hereinafter, the second embodiment of the present invention will be described more specifically with reference to the drawings, but the present invention is not limited thereto. FIG. 3 shows a cross-sectional view of the denture of the present invention. The artificial tooth 1 is supported by the first floor member 7 directly contacting a part of its surface. The second floor member 8 directly contacts a part of the surface of the first floor member 7. The third floor member 9 supports the first floor member 7 via the second floor member 8, and has a recess 3 for jaw ridge engagement. The metal member 4 has one end 5 in the first floor member 7, extends opposite to the artificial tooth 1, and the other end 6 is exposed from the recess 3 for jaw ridge engagement, and has Make up the part. The metal member 4 penetrates the second floor member 8. It can be said that also in the embodiment of FIG. 4, the metal member 4 penetrates the second floor member 8. Further, the recess for engaging the ridge may be configured as shown in FIG. 5, that is, composed of a metal member 4, a first floor member 7, a second floor member 8 and a third floor member 9. It may be.

The metal member 4 may have the same material and shape as the dog described in the first embodiment.

When the denture has at least two artificial teeth in common with the first embodiment and the second embodiment, the metal member may be, for example, a center line 10 of the wearer's ridge as shown in FIG. Preferably extends along. The distance that the metal member extends along the center line 10 of the ridge (hereinafter referred to as the "width of the metal member") is determined by the number of artificial teeth used, for example, the denture to be created is a local denture. Or a complete denture, Varies depending on the size of the denture required by the wearer or the type and size of the artificial tooth used. When producing a local denture having one artificial tooth, the width of the metal member can be, for example, 2 to 10 mm, and preferably 4 to 6 mm. On the other hand, when creating an artificial denture having 14 artificial teeth, the width of the metal member can be, for example, 7 to 15 cm, and preferably 8 to 12 cm. Further, it is preferable that the metal member is not exposed from the denture base at the distal end 11 of the ridge, in the width direction of the metal member. The metal member is preferably not exposed from the denture base in the thickness direction.

ADVANTAGE OF THE INVENTION According to this invention, it is possible to use as a reinforcement member in a denture base even if it is a metal member which was conventionally difficult to adhere | attach with a rubber-like substance, especially a silicone rubber. .

The cross-section along the transverse line 12 in FIG. 6 corresponds to FIGS. 1 to 5 and FIGS.

When the denture of the present invention is a denture for an upper jaw, for example, as shown in FIG. 8, the metal member 4 is integrated with a metal member made of a thin metal plate 13 covering the upper palate. Is preferred. Further, in the present invention, the metal member may have a mesh portion 14 as shown in FIG. The porosity and shape of the mesh portion 14 can be appropriately determined in consideration of the adhesiveness between the denture base, particularly, the first floor member and the second floor member. FIG. 9 is a cross-sectional view of the denture with the metal member shown in FIG. At this time, the size and shape of the thin metal plate 13 of the metal member can be appropriately determined so as to cover the entire upper palate of the wearer. For example, the thickness of the thin metal plate 13 can be, for example, 1.0 to 2.5 mm, and preferably 1.5 to 2.0 mm. In the present invention, in the maxillary denture, the desired strength is achieved and the tongue can be easily moved even if the thickness of the thin metal plate 13 as a member for covering the upper palate portion is made as thin as the above. To reduce pressure on the upper jaw be able to. Also, the feeling of wearing is improved compared to conventional non-metallic members. Also, when eating hot food, the warmth of the upper palate can be sufficiently felt through the thin metal plate.

Further, the present invention includes the embodiments shown in FIGS. 10 and 11. More specifically, FIG. 10 is a cross-sectional view of a denture with a maxillary denture when a metal member having a mesh portion 14 is used. In FIG. 10, the mesh portion 14 of the metal member is in direct contact with the first floor member 7. The second floor member 8 directly contacts the other side of the mesh member 14 and a part of the first floor member. The mesh member 14 can receive the pressure applied to the vicinity of the ridge ridge center line via the second floor member 8. In FIG. 10, the mesh portion 14 does not cause pain to the wearer because the ridge and mucous membrane of the wearer do not directly contact the metal member and receive the pressure through the thin second floor member. In addition, the pressure can be applied to such an extent that the progress of bone resorption can be prevented.

On the other hand, FIG. 11 is a cross-sectional view of a mandibular floor denture in the case where a metal member having a mesh portion 14 is used. In FIG. 11, the metal member has the other end 6 forming a part of the recess for engaging the ridge, and a mesh portion 14 extending between the first floor member and the second floor member.

Hereinafter, an example of the method for manufacturing a denture with a bed of the present invention will be described.

(Preparation of mandibular denture)

First, paraffin wax having a predetermined shape and dimensions is formed by molding a form in the mouth of the wearer. On top of this, a predetermined number of artificial teeth are arranged along the center line of the ridge, for example, in the case of a complete denture, to create a prototype of a denture with a denture. This is buried in gypsum in a predetermined container, for example, a dental bottle-type flask so as to be buried from artificial teeth, and then the gypsum is hardened. Thereafter, the molten paraffin wax is removed by heating in a usual manner to obtain a gypsum split mold in which artificial teeth are arranged in the gypsum. Fill 0.5 to 10 g of paste-like acrylic resin in consideration of the number of artificial teeth, etc., so as to make direct contact with a part of the artificial teeth in the gypsum split mold cavity. On top of this, a metal member having the above-described form (having no thin metal plate) is extended from inside the acrylic resin to face the artificial tooth without directly contacting the artificial tooth, and It will be installed along the center line of the ridge.

Next, in consideration of the number of artificial teeth and the like, the acrylic resin and the rubber-like substance are mixed (kneaded) on a mixed paper with a spatula at the above-mentioned mass ratio. This mixture (kneaded material) is filled so as to directly cover the entire surface of the acrylic resin exposed in the cavity. Then, 0.7 to 15 g of the rubber-like substance is directly covered on the whole surface of the mixture (kneaded material) exposed in the cavity. At this time, the metal member covers the longitudinal direction of the metal member extending beyond the human teeth, but the above-mentioned contact portion between the ridge and the mucous membrane is exposed (for example, see FIG. 1). This is heated in a pressure cooker for 20 to 30 minutes.

After cooling, remove from gypsum and grind (burr removal) using a grinder. Next, the surface of the denture is subjected to a finishing treatment using oxidized alumina and a coating material. This is inserted into the oral cavity of the wearer, fully occluded at the central occlusal position, and after performing a series of functional movements, taken out of the oral cavity, trimming the rim using scissors or a knife, etc. A denture (see Fig. 12 as an example) can be obtained.

(Preparation of dentures for upper jaw)

The upper denture for the upper jaw (Fig. 13) can be manufactured in the same manner as the method for preparing the lower denture for the lower jaw, but the metal member as shown in Fig. 8 is used. Specifically, after filling the acrylic resin, the metal member as shown in Fig. 8 is operated in the same way as the mandibular denture, and does not come into direct contact with the artificial teeth. It should be installed so that it extends facing the artificial tooth and along the center of the chin base.

According to the present invention, a metal that has been conventionally considered to have a weak binding property with a rubber-like substance is used as a member. Because it can be used as a denture, it can be reinforced to improve the durability of the entire denture. Further, it is possible to apply a stimulus (pressure), that is, a load to the intraoral ridge and mucous membrane of the wearer via the metal member of the present invention to such an extent that pain does not occur. Bone resorption that occurs when the rubber-like substance contacts the ridge ridge mucosa can be effectively prevented. By preventing bone resorption, pain can be minimized, making it easier to chew not only soft foods, but also hard foods, and effectively prevent indigestion .

Also, in the maxillary denture, metal can be used as a member to be attached to the maxillary palate, so that the thickness of such a member can be made thinner than before, and the tongue can be easily moved, and the upper jaw can be easily moved. The feeling of oppression can be reduced. Furthermore, when eating hot food, the warmth of the upper palate can be sufficiently felt through the metal member. A denture with no denture stomatitis can be provided even after wearing for a long period of time.Examples will be shown below, and the present invention will be specifically described. However, the present invention is limited to the following examples. Not something. Example

Example 1 (Preparation of mandibular denture)

First, a flooring with 14 artificial teeth placed and supported along the centerline of the mandibular ridge on paraffin wax having a predetermined shape and dimensions created by molding the inside of the mouth of the wearer Prototype of denture was created. This was buried in a gypsum placed in a dental bottle flask by embedding it from artificial teeth, and then the gypsum was hardened. Then, the bottle flask was closed and heated. Next, the bottle-type flask was opened, the molten paraffin wax in the hollow was removed, and a gypsum split mold in which artificial teeth were arranged in gypsum was obtained. 8 g of a paste-form acrylic resin (manufactured by GIC Corporation: trade name: GSI ACRON) was filled so as to directly contact the surface of the artificial tooth exposed in the cavity. On this, the metal member shown in FIG. 7 was installed. This metal member is made of Kono'-Noretochrome alloy. One end of the metal member was placed in the acrylic resin, facing the artificial tooth, and extending along the center of the ridge, without directly contacting the artificial tooth. The metal member had a length of l mm, a thickness of 4 mm, and a width of 12 cm. The contact between the ridge and mucous membrane and the maxillary palate of the metal member was adjusted in advance to match the shape and size of the wearer's ridge and mucous membrane and the maxillary palate.

Next, 2 g of the above acrylic resin and 8 g of a paste-form addition type silicone rubber (manufactured by Shin-Etsu Chemical Co., Ltd .: trade name KE-195-70 (A-B)) were mixed with a spatula on a kneaded paper. And mixed (mixed). 1 g of this mixture (kneaded material) was filled so as to directly cover the entire surface of the acryl-based resin exposed in the recess. Then, 10 g of the silicone rubber is directly covered over the entire surface of the mixture (kneaded material) exposed from the inside of the cavity, and is covered with a metal member portion extending opposite to the artificial tooth. The filling was performed so that the mucous membrane contact portion was exposed. In addition, a recess was made of silicone rubber to engage the ridge and mucous membrane of the wearer so that a part of the recess was constituted by the surface of the metal member that touched the ridge and mucous membrane (see Fig. 1). . This was heated in a pressure cooker for 20 minutes.

After cooling, it was removed from the gypsum and ground (burr removed) using a polishing burr. Next, the denture surface was finished using alumina oxide and a coating material. Insert into the oral cavity of the wearer, fully occlude at the central occlusal position, perform a series of functional movements, remove it from the oral cavity, use scissors, a knife, etc. to adjust the marginal shape and use it for the lower jaw A denture (Fig. 12) was obtained.

6 Example 2 (Preparation of denture for upper jaw)

Using the metal member shown in Fig. 8 (same as Fig. 7 except that it has a thin metal plate 13 with a thickness of 2.0 mm), this is operated in the same manner as a mandibular denture, and directly connected to the artificial tooth. The same procedure as in Example 1 was carried out except that the artificial denture was extended from inside the acrylic resin to face the artificial teeth without contact, and to extend along the center line of the ridge. (Figure 13).

Example 3 (Performance evaluation)

The following results were obtained when the mandibular dentures and upper dentures prepared in Examples 1 and 2 were actually used for a wearer who required complete dentures.

(1) The metal plate attached to the upper palate was thin and the tongue was easy to move. There was no feeling of pressure on the upper jaw.

(2) Both the upper denture and the lower denture had good wearing feeling. In particular, the maxillary denture had a significantly better feeling of wearing than the conventional nonmetallic (soft) lining material used for the palate.

(3) The maxillary denture was less likely to peel off compared to the case where the conventional nonmetallic (soft) lining material was used for the palate.

(4) Even if the mouth was wide open, it was hard to come off.

(5) When eating hot food, I could feel enough warmth in the upper palate through the metal plate.

(6) During chewing, no food residue was easily interposed between the denture and the oral mucosa, and no pain was felt. Even hard foods (cracked rice) could be chewed without pain.

(7) Denture stomatitis did not occur 30 days after wearing.

(8) After 180 days from the wearing, no bone resorption had occurred, the feeling of wearing was still good, and no pain occurred even when combined.

Claims

The scope of the claims

1. A denture having at least one artificial tooth and a denture base supporting the artificial tooth,

The denture with dentures, wherein the denture base has a concave portion that engages with the ridge of the wearer, and a part of the concave surface is made of a metal member.

2. The denture according to claim 1, wherein the denture base is formed by bonding an acryl-based resin and a rubber-like substance.

3. The denture with dentures according to claim 1, wherein the metal member has one end in the denture base, and the other end has a shape constituting a part of the concave surface.

4. The metal member is a metal selected from the group consisting of gold, silver, cobalt chromium alloy, gold alloy, silver alloy, gold 'silver' palladium alloy, titanium, platinum alloy, nickel chromium alloy and stainless steel. 4. The toothed floor ^ according to any one of claims 1 to 3, comprising:

5. The denture according to any one of claims 1 to 4, which is an upper denture, wherein the metal member is integrated with a metal member made of a thin metal plate that covers the upper palate.

6. The denture with a floor according to any one of claims 1 to 5, wherein the other end of the metal member has a curved shape.

7. The covered denture according to any one of claims 1 to 6, wherein the length of the metal member is 6 mm or less.

8. The denture with a denture according to any one of claims 1 to 7, wherein the metal member has a thickness of 2 to 6 mm.

9. A denture having at least one artificial tooth and a denture base supporting the artificial tooth,

A first floor member made of an acrylic resin, wherein the denture base directly contacts and supports a part of the surface of the artificial tooth; and an acrylic that directly contacts a part of the surface of the first floor member. A second floor member made of a mixture of a rubber-based resin and a rubber-like substance, the first floor member being supported through the second floor member, and having a concave portion for engaging a chin ridge of a wearer. Consists of a third floor member,

A denture with a floor, wherein a part of the concave surface is made of a metal member.

10. The denture with a denture according to claim 9, wherein the metal member has one end in the first denture base, and the other end has a shape constituting a part of the concave surface.

11. The denture with a floor according to claim 9, wherein the metal member has a mesh portion located between the first floor member and the second floor member.

12. The floor denture according to any one of claims 9 to 11, wherein the ridge engaging portion is directly in contact with and engages the intraoral ridge and mucous membrane of the wearer.

13. The denture with dentures according to any one of claims 9 to 12, wherein the acrylic resin is a methacrylic resin.

14. The covered denture according to any one of claims 9 to 13, wherein a ratio between the acrylic resin and the rubber-like substance is 1: 9 to 9: 1 by mass ratio.

15. The denture according to any one of claims 9 to 14, wherein the rubbery substance is silicone rubber.

16. The denture with a floor according to any one of claims 9 to 15, wherein the rubber-like substance of the third floor member has a JIS-A hardness of 10 to 80.

17. The denture with a floor according to any one of claims 9 to 16, wherein the metal member penetrates through the second floor member.

18. The metal member is selected from the group consisting of gold, silver, chromium chromium alloy, gold alloy, silver alloy, gold 'silver' palladium alloy, titanium, platinum alloy, nickel chromium alloy and stainless steel The denture according to any one of claims 9 to 17, comprising a metal.

19. An upper denture, wherein the metal member is a thin metal plate that covers the upper palate. 19. The denture with a floor according to any one of claims 9 to 18, wherein the denture is integrated with the metal member.