JPH01155843A - Connected artificial teeth - Google Patents

Abstract

PURPOSE:To efficiently prepare a prosthesis having excellent aesthetic appearance, by connecting and unifying a plurality of artificial teeth by a gum part composed of a photopolymerizable type non-polymerized resin paste. CONSTITUTION:A connected artificial teeth is constituted of an artificial teeth part 1 and a gum part 5 composed of a photopolymerizable type non- polymerized resin paste to which the shape of the gum is provided. The artificial teeth part 1 has a cavity part formed to the alveolar surface and/or lingual surface thereof and the photopolymerizable type non-polymerized resin paste is bonded to said cavity part. A plurality of artificial teeth are connected and unified by the photopolymerizable type non-polymerized resin paste.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention relates to artificial teeth used when manufacturing a prosthesis using a photopolymerizable resin, particularly artificial teeth formed by connecting and integrating a plurality of artificial teeth. Regarding connected artificial teeth.

(Prior art and problems to be solved by the invention) Conventionally, in the production of prosthetics using photopolymerized resin, artificial teeth have been used for a long time, namely, prosthesis made with chemical polymerization type and heat polymerization type resin. The same thing that was used to make it was used.

When making dentures using photopolymerizable resin using the artificial teeth, the surgeon removes a layer of the alveolar surface of the artificial teeth each time to ensure a strong bond with the photopolymerizable resin.
- Adhesive was applied one by one, a photopolymerizable resin was further attached to it, and then the artificial teeth were aligned on the denture base.

However, with these methods, operations such as removal and adhesive application are complicated and require skill, making it difficult to always obtain stable and reliable adhesive strength.

As a result, the artificial tooth may fall off while being used in the patient's mouth, or a gap may be created between the artificial tooth and the photopolymerized resin, where dirt may be deposited, causing the area around the artificial tooth to become damaged. It can also cause discoloration.

In addition, the photopolymerizable resin paste, which is attached to the applied adhesive afterward, can be used by simply pressing against the flat alveolar surface of conventional artificial teeth, and since the adhesive is unpolymerized and liquid, it is possible to connect the photopolymerizable resin paste to the artificial tooth. It is difficult to keep the artificial tooth securely in place on the floor because it tends to move between the resin paste and the tooth.

Furthermore, after fixing the artificial tooth to the floor, it is necessary to add photopolymerizable resin paste to compensate for the lack of gingival tissue, but this also requires adhesive, making the operation complicated. Furthermore, at this time, the adhesive layer is partially exposed on the surface layer of the gingival region, which impairs the aesthetics of the completed prosthesis.

Furthermore, in order to secure and align the artificial teeth one by one on the floor,
The work required skill and was time-consuming.

As mentioned above, when manufacturing dentures using photopolymerizable resin using conventional artificial teeth, it is difficult to align the artificial teeth, and the ease of operation achieved by using photopolymerizable resin is difficult. It wasn't showing its full potential.

(Means for Solving the Problems) In view of the above problems, the present inventors have conducted intensive research and found that
We have succeeded in providing an artificial tooth that eliminates all the problems with conventional technology.

That is, the present invention provides an artificial tooth portion in which a recess is provided on the alveolar surface and/or lingual surface of the artificial tooth and a photopolymerized unpolymerized resin paste is adhered thereto, and a photopolymerized unpolymerized resin paste that has a gingival shape. This is a multi-connected artificial tooth in which a plurality of the above-mentioned artificial teeth are connected and integrated by the above-mentioned photopolymerized unpolymerized resin paste part. It has been found that when used, it is possible to fabricate a prosthesis with excellent esthetics in an extremely efficient manner.

That is, the present invention provides an artificial tooth portion in which a recess is provided on the alveolar surface and/or lingual surface of the artificial tooth and a photopolymerized unpolymerized resin paste is adhered to the artificial tooth, and a photopolymerized unpolymerized resin paste with a gingival part form. A connected artificial tooth is characterized in that a plurality of artificial teeth are connected and integrated by the photopolymerized unpolymerized resin paste portion.

Below, the structure of the connected artificial tooth according to the present invention will be explained with reference to the drawings.

As shown in FIGS. 1 and 2, the connected artificial tooth of the present invention is generally composed of an artificial tooth portion 1 and a gingival portion 5 to which a photopolymerized unpolymerized resin paste having a gingival shape is adhered.

The artificial tooth part 1 has a recessed part 4 formed on its alveolar surface 2 and/or lingual surface 3 as shown in FIGS. 3 and 4, and is made of resin or porcelain, which are commonly used in dentistry. Or metal teeth can be used, but it is preferable to use resin teeth or porcelain teeth that have some translucency. The artificial tooth can be provided by molding and manufacturing an artificial tooth using a mold having a protrusion corresponding to a depression on its inner surface.

The function of the recessed portion 4 is that a large amount of photopolymerized unpolymerized resin paste, which is adhesively laminated on the lower surface, can be piled thickly and it can be prevented from moving. Its purpose is to easily adjust the position, direction, etc. of the teeth by lightly pressing the teeth in any direction.

Since the recess 4 was provided on the alveolar surface and/or the lingual surface, ■
The gingival part 5 to which the photopolymerized unpolymerized resin paste is bonded has a wide bonding surface and can be firmly bonded; ■The position and direction can be easily adjusted when pressing the artificial teeth against the floor and arranging them. and (2) there is an advantage that no modification of the shape of the artificial tooth portion 1 is required.

The adhesive layer 5'' is a chemical bonding layer that exists between the artificial tooth part 1 and the photopolymerized unpolymerized resin paste part 5'' to chemically bond and fix them, and is usually formed by using an adhesive. However, its main components are methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate, glycidyl methacrylate, methoxydiethylene glycol methacrylate, methoxytetraethylene glycol methacrylate, and methoxypolyethylene glycol methacrylate. , 2-hydroxyethyl methacrylate, 3-
Examples include chloro-2hydroxypropyl methacrylate and tetrahydrofurfuryl methacrylate.

It is preferable to add a filler to the adhesive layer 5°,
As the filler, soluble and/or insoluble organic polymers, particulate silica fillers, etc. can be used. Examples of soluble and/or insoluble organic polymers include methacrylate and/or acrylate polymers, and it is possible to use one or more of these organic polymers.

Note that chemical polymerization type, heat polymerization type, and photopolymerization type resins can be used as the adhesive for forming the adhesive layer in the present invention, but chemical polymerization type and photopolymerization type adhesives are preferably used. Of course, these three types of adhesives can be used in combination.

The above-mentioned chemical polymerization type adhesive is completely cured within several minutes to about 10 minutes at room temperature after being applied.

The chemical polymerization type initiator used in the adhesive layer 5' includes a combination of an organic peroxide and a tertiary amine, and a combination of an organic peroxide and an organic boron compound. For example, organic peroxides include benzoyl peroxide, hydroperoxides, ketone peroxides, dialkyl peroxides, diacyl peroxides, peroxy esters, and the like.

Examples of the tertiary amine include dimethyl para-toluidine, jetanol para-toluidine, triethylamine, trilobyl amine, and dimethylaminoethyl methacrylate. Examples of organic boron compounds include tri-n-butylborane.

Formation of the adhesive layer 5° using a photopolymerizable adhesive can be performed by applying a thin layer of photopolymerizable unpolymerized resin paste to the four surfaces of the recess, and irradiating it with light to polymerize it.

As a photopolymerization initiator that can be used in the adhesive layer 5°, a combination of an organic peroxide and a photosensitizer is used. Particularly preferably a combination of an organic peroxide, a photosensitizer and a reducing agent is used. For example, organic peroxides include benzoyl peroxide, hydroperoxides, ketone peroxides, dialkyl peroxides, diacyl peroxides, peroxy esters, and the like. Examples of photosensitizers include benzyl, camphorquinone, thiopyrylium salt, α-naphthyl, acenaphcene, p.

Examples include p'-dimethoxybenzyl, p,p'-dichlorobenzyl, 2-chlorothioxason, 2,4-diethoxythioxason, methylthioxason and methylbenzoyldiphenylphosphine oxide.

As a reducing agent, dimethylaminoethyl methacrylate, n-butylamine, triethylamine, triethyl-
Examples include n-butylphosphine and isoamyl 4-dimethylaminobenzoate.

The photopolymerizable unpolymerized resin paste portion 5'' includes: - a photopolymerizable resin paste consisting of components such as monofunctional and/or polyfunctional methacrylate and/or acrylate, filler, photosensitizer, peroxide, etc.; A resin composition is used. As the monofunctional methacrylate and/or acrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, butyl methacrylate, cyclohexyl methacrylate, benzyl methacrylate, glycidyl methacrylate, methoxydiethylene glycol methacrylate, methoxytetraethylene glycol methacrylate , methoxypolyethylene glycol methacrylate, 2-hydroxyethyl methacrylate, 3-chloro-2hydroxypropyl methacrylate, tetrahydrofurfuryl methacrylate, etc. 2,2-bis(4-methacryloxyphenyl)propane, 2,2-bis(4-methacrylate) oxyethoxyphenyl)propane, 2.2-bis(4-methacryloxypropoxyphenyl)propane, 2.2-bis(4-3methacryloxy2hydroxypropylphenyl)propane and their acrylates,
urethane dimethacrylate and these acrylates,
Examples include trimethylolethane trimethacrylate, trimethylolpropane trimethacrylate, pentaerythritone, lutrimethacrylate, and their acrylates.

In addition, as the polyfunctional methacrylate and/or acrylate, ethylene glycol dimethacrylate, diethylene glycol dimethacrylate, polyethylene glycol dimethacrylate, polypropylene glycol dimethacrylate, neopentyl glycol dimethacrylate, 1.3 butanediol dimethacrylate, 1.6 Examples include hexane dimethacrylate, 2hydroxy 1,3 dimethacryloxypropane, and their acrylates.

As the filler for the photopolymerized unpolymerized resin paste portion 5'', soluble and/or insoluble organic polymers and fine particulate silica fillers can be used.As the soluble and/or insoluble organic polymers, methacrylate and/or acrylate polymers can be used. It is possible to use one or more of these organic polymers.

Examples of peroxides used in the photopolymerized unpolymerized resin paste portion 5'' include benzoyl peroxide as an organic peroxide, and other peroxide catalysts can also be used. Examples of peroxide catalysts include hydroperoxide necks, ketone peroxides, dialkyl peroxides, diacyl peroxides, and peroxy esters.

Photosensitizers used in the photopolymerizable unpolymerized resin paste portion 5'' include benzyl, camphorquinone, thiopyrylium salt, α-naphthyl, acenaphcene, p,p--dimethoxybenzyl, p,p゛,-dichloro benzil, 2
-chlorothioxanthone, 2,4-jethoxythioxanthone, methylthioxanthone trimethylbenzoyldiphenylphosphine oxide and the like. Examples of the reducing agent include dimethylaminoethyl methacrylate, n-butylamine, triethylamine, triethyl-n-butylphosphine, and isoamyl 4-dimethylaminobenzoate.

An example of the manufacturing process of the connected artificial tooth according to the present invention will be described below with reference to the drawings.

[1] As shown in FIGS. 3 and 4, a depression 4 is formed on the alveolar surface 2 and/or the lingual surface 3 of the artificial tooth section 1. Recess 4
For example, the formation of artificial teeth can be carried out by machining such as cutting or polishing a commercially available artificial tooth, or by press molding, injection molding, etc. using a mold with an inverted inner surface (press mold, injection mold, etc.). can.

[2] Apply adhesive to the four sides of the recessed part of the artificial tooth to form an adhesive layer of 5°.

[3] A large number of artificial teeth provided with the adhesive layer 5° are arranged in a uniform manner according to the required dental arch, and a photopolymerized unpolymerized resin paste is applied to these to connect the large number of teeth. ,
A photopolymerized unpolymerized resin paste portion 5'' is formed to have the shape of a gingival region.

Although the connected artificial tooth according to the present invention is manufactured through the above steps, it is preferable that the light-heavy resin paste according to the present invention is unpolymerized.

Unpolymerized resin paste has plasticity, so when arranging a large number of teeth on a denture base, etc., it is easy to fine-tune their position and direction by simply pressing each artificial tooth slightly in any direction with your fingers. There are advantages that can be achieved.

Since each of the multiple teeth is connected with a plastic unpolymerized resin paste, their position can be moved forward, backward, left, and right to some extent by pressing or pulling them with your fingers. This gives rise to the advantage that proper sorting work on the floor can be carried out easily.

In addition, the photopolymerized unpolymerized resin paste portion 5″ is the adhesive layer 5
Because it is chemically bonded and fixed to the artificial tooth part 1 through the ``misalignment''
The artificial tooth alignment can be performed reliably and easily without causing any problems.

Furthermore, the photopolymerized unpolymerized resin paste portion 5'' is provided with a gingival shape, which reduces the process of adding photopolymerized resin later and allows the formation of a floor polishing surface at the same time. Not only can this process be carried out efficiently, but also a prosthesis with excellent aesthetics can be obtained.

(Example) The present invention will be specifically explained based on examples.

Example 1 First, FIGS. 1 and 2 show perspective views, and FIGS. 3 and 4 show perspective views.
A connected artificial tooth, the cross-sectional view of which is shown in the figure, was fabricated by the following procedure.

■ The alveolar surfaces of Univac Polychrome anterior teeth (manufactured by Torafutona Corporation, porcelain teeth) and Univac NIC molars (manufactured by Torafutona Corporation, porcelain teeth) were ground down using a diamond point to create one shape as shown in Figures 3 and 4. .

(2) A tingling layer of a silane coupling agent (a 5% acetone solution of γ-methacryloxypropyltrimethoxysilane) was applied to this surface, and hot air at 120° C. was blown for 2 minutes.

(2) Thereafter, a layer of Superbond C&B (manufactured by Sun Medical Co., Ltd., dental chemical polymer adhesive) was coated on the silane coupling agent coated layer of the artificial tooth obtained in (2) above.

■ A large number of artificial teeth obtained in step (2) were arranged in the required dental arch, and then a photopolymerized unpolymerized resin paste (A) composition having the following composition was prepared as shown in Figures 3 and 4. Each artificial tooth was built up so as to be connected so as to have the following gingival shape.

Photopolymerizable resin paste (A) ffi formation; 2.2-bis(4-methacryloxyethoxyphenyl)propane
30 parts by weight Triethylene glycol dimethacrylate 10 parts by weight Methyl methacrylate 10 parts by weight Poly(diethylene glycol dimethacrylate) 5 parts by weight Poly(methyl methacrylate) 30 parts by weight Silica filler 15 parts by weight Benzoyl peroxide 0.7 parts by weight Camphor quinone
0.2 parts by weight intercolor pigment
A complete denture was fabricated using a small amount of the connected artificial tooth and a photopolymerized unpolymerized resin paste for the base according to the following procedure.

(1) Acrelsep (manufactured by Nilasin Co., Ltd., separation agent) was applied to the mucous membrane surface of a plaster model that reproduced the inside of the oral cavity.

(2) A sheet-shaped photopolymerized unpolymerized resin paste was pressed onto the required portion of the mucous membrane surface of the plaster mold according to the size of the denture base. Here, light irradiation was performed for 2 minutes using α-light (manufactured by Morita Tokyo Seisakusho, visible light polymerization device) to harden the light heavy mold unpolymerized resin paste.

(3) Further, crimping the connected artificial tooth according to the present invention in a predetermined position on the photopolymerizable resin bed obtained in (2) above,
After temporary attachment, light irradiation was performed for 2 minutes using a quick light (manufactured by Morita Seisakusho, visible light irradiator).

(4) After preparing the photopolymerizable resin paste area around the connected artificial tooth and forming the floor polishing surface, apply Evolex Rebase air barrier agent (manufactured by NOF Corporation, air tract sealant). Then, it was irradiated with α-light for 2 minutes.

(5) The complete denture obtained in (4) was carefully removed from the plaster model, and Evolex Rebase air barrier agent was applied again to the mucosal surface of the entire denture.

Thereafter, light irradiation was performed with α-light for 6 minutes.

(6) The hardened total denture was corrected and polished using a carbide burr to complete the complete denture.

In addition, in (3) and (4) above, by pressing each artificial tooth in any direction with fingers, adjustment of its position, direction, etc., that is, proper alignment, could be easily carried out in a short time. .

The operation was easier than in the comparative example described below, and the resulting complete denture was extremely aesthetically pleasing.

Example 2 An artificial tooth whose cross-sectional view is shown in FIG. 4 was manufactured by the following procedure.

■ Using methyl methacrylate and cyclohexyl methacrylate (1:1) copolymer, the fourth
An artificial tooth having a concave shape as shown in the figure was molded.

(2) Next, one layer of methyl methacrylate was applied as a liner to the surface of the artificial tooth cavity, and then one layer of Super Bond C&B was applied.

■ Immediately apply the photopolymerized unpolymerized resin paste (
A> was built up to have the gingival shape as shown in FIG.

Using the thus obtained connected artificial tooth shown in Figure 2, a denture for a case of a metal-based denture with 76 and 67 defects was fabricated using a photopolymerized unpolymerized resin paste according to the following procedure. did.

(1) After applying AcrelSep to the mucosal surface of the plaster model, the metal bed was returned to its normal position on the model.

(2) A sheet-shaped photopolymerized unpolymerized resin paste was pressed onto the required portions of the mucous membrane surface of the plaster model in accordance with the size of the denture base. Here, the photopolymerizable unpolymerized resin paste was cured by irradiation with α-light for 2 minutes.

(3) Furthermore, the connected artificial tooth was crimped and temporarily attached to a predetermined position on the photopolymerizable resin bed obtained in (2) above.

(4) After preparing the photopolymerizable resin paste area around the linked artificial tooth and forming the floor polishing surface, apply Evolex Rebase air barrier agent and apply 2 coats with α-Light.
It was irradiated with light for a minute.

(5) The partial denture obtained in (4) was carefully removed from the model, the Eporex Rebase air barrier agent was applied again to the mucosal surface of the denture base, and irradiated with α-light for 6 minutes.

(6) The hardened denture was modified and polished using a carbide burr to complete the denture.

In addition, in (3) and (4) above, by pressing and pulling each artificial tooth in any direction with your fingers,
Adjustment of the front, rear, left, and right positions, directions, etc., that is, proper arrangement, could be easily carried out in a short time.

The operation was easier than in the comparative example described below, and the resulting dentures were extremely aesthetically pleasing.

Comparative Examples Commercially available artificial teeth for comparison: Lipdent front teeth (manufactured by Menji Dental Industry Co., Ltd., resin teeth) and Ribpunt FB-30 (
Example 1 using resin teeth (manufactured by Menji Dental Industry Co., Ltd.)
A complete denture for the same case was fabricated using photopolymerizable resin using the following procedure.

(1) Triat MRA (manufactured by Denppli Co., Ltd., separation agent) was applied to the mucous membrane surface of a plaster model that reproduced the inside of the oral cavity.

(2) A sheet of Triatresin (manufactured by Dentsply Co., Ltd., photopolymerizable resin) was pressed onto the required portion of the mucous membrane surface of the plaster model in accordance with the size of the denture base. Here, try a cure unit (manufactured by Dentsbrei, light irradiator)
The triatresin was cured by light irradiation for 2 minutes.

(3) In order to further strengthen the adhesion between the artificial tooth and the triat resin, an undercut portion was added to the alveolar surface of the artificial tooth by cutting.

(4) Triat bonding agent (manufactured by Denppli Co., Ltd., bonding agent) is applied to the alveolar surface of the artificial tooth prepared above, and a large number of artificial teeth are obtained in (2) above, with Triat resin placed on this surface. It was crimped in place on the Triat resin bed. However, the bonding agent is liquid and causes the artificial tooth to move, making it difficult to position it. Thereafter, light irradiation was performed for 2 minutes using a triatocure unit.

(5) After applying Triat bonding agent around the artificial tooth, Triat resin was built up to adjust the shape of the polished floor surface. At this time, the operation was complicated because the triatresin paste had to be sufficiently press-fitted into the gap below the artificial tooth. Thereafter, Triat ABC (manufactured by Denppli Co., Ltd., a shielding agent) was applied to the surface of the floor test, and irradiated with light for 2 minutes using a Triat Cure unit.

(6) The complete denture obtained in (5) was carefully removed from the plaster model, and Triat ABC was applied again to the mucosal surface of the entire denture. Thereafter, light irradiation was performed for 6 minutes using a triad cure unit.

(7) The hardened base denture was corrected and polished using a carbide burr to complete the base denture. The resulting complete denture had insufficient aesthetics because the adhesive layer was exposed in some places in the gingival region.

The work of properly arranging the artificial teeth on the floor surface is time-consuming and takes about 4 times as long as in the embodiment of the present invention (approximately 1
time).

(Effects of the Invention) As explained in detail in the Examples and the like above, an artificial tooth part in which a recess is provided on the alveolar surface and/or a lingual surface of the artificial tooth and a photopolymerized unweighted resin paste is adhered to the artificial tooth part, and a gingival part form. A connected artificial tooth of the present invention, in which a plurality of artificial teeth are connected and integrated by the gingival part of the photopolymerized unpolymerized resin paste. Since the denture is already a semi-finished product in which many teeth are connected, each artificial tooth is already formed with a strong photopolymerized unpolymerized resin paste part and has a gingival shape. The person takes out the invention product from the storage case,
Press and pull each tooth slightly with your fingers to adjust their position.
After finely adjusting the arrangement such as direction, resin polymerization and curing treatment by light irradiation may be performed.

Therefore, if the artificial tooth of the present invention is used, the time and effort required to produce a denture prosthesis can be greatly reduced, and a denture prosthesis with excellent aesthetics can be produced efficiently and in a short time without requiring any skill. It becomes possible.

This makes it possible for patients to wear denture prostheses with excellent aesthetics in a short period of time, making a significant contribution to this field.

[Brief explanation of the drawing]

1 and 2 are perspective views of an embodiment of a connected artificial tooth according to the present invention, and FIGS. 3 and 4 are a cross-sectional view taken along the line A-A' in FIG. 1 and a cross-sectional view taken along the line B-B' in FIG. are shown respectively. 1: Artificial tooth part, 2: Alveolar surface, 3: Linguistic side, 4: Recessed part,
5°: Adhesive layer,

Claims (3)

[Claims] (1) An artificial tooth part in which a recess is provided on the alveolar surface and/or lingual surface of the artificial tooth and a photopolymerized unpolymerized resin paste is adhered thereto;
and a gingival part of a photopolymerized unpolymerized resin paste that has a gingival shape, and a plurality of artificial teeth are connected and integrated by the gingival part of the photopolymerized unpolymerized resin paste. Connected artificial teeth. (2) The connected artificial tooth according to claim 1, wherein the adhesive layer of the artificial tooth portion is completely hardened or temporarily hardened. (3) Claim 1 or 2, characterized in that the adhesive layer is a chemically polymerized resin or a photopolymerized resin.
Connected artificial teeth as described in section.