JP3449733B2 - Denture production set and method for producing denture - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to relates to a construction kit and a method for manufacturing a novel definition teeth.

[0002]

2. Description of the Related Art At present, in dental treatment, a denture base made of a polymerizable floor resin composition (hereinafter sometimes referred to as a resin) is attached to a patient who has lost teeth due to aging or the like. There is. However, the denture base is manufactured through a very complicated process. For example, the outline of the production of a complete denture is as follows: (at the dental clinic) 1) Taking an impression of the affected area with an impression material 2) Reproducing the affected area morphology with gypsum (work model production) (from dental clinic to laboratory) (Move and work in the laboratory) 3) Make occlusal floor on the work model (move from the laboratory to the dental clinic and work in the dental clinic) 4) Obtain occlusal (move from the dental clinic to the laboratory, Work in the laboratory) 5) Preparation of wax mold for denture base 6) Arrangement of artificial teeth to the wax mold (moving from the lab to the dental clinic and working in the dental clinic) 7) Intraoral trial preparation of wax mold (At the laboratory again) 8) Immersion of wax mold in plaster, preparation of mold by running wax 9) Filling of the resin for the floor into mold and heat polymerization 10) Removal of denture base (from the laboratory to the dental clinic) Transfer) 11) The process consists of trial fitting into the patient's mouth, final adjustment, and polishing.

That is, a mold for a denture base is prepared, and a paste-like polymerizable resin is filled therein and polymerized.

[0004]

What complicates the complicated process in the above-mentioned method is that there are a lot of round trips between the dental clinic of the working model or wax type and the laboratory. The reason for this reciprocation is that it is necessary to adjust the positions of the gums and artificial teeth by trial fitting in the oral cavity in steps 3 and 7. Furthermore, righteousness teeth made in the conventional way, even those skilled technician is produced,
It may not show sufficient compatibility. It is considered that this is because the error from the original form increases as the number of copies increases through complicated processes, and the polymerizable denture base resin is deformed due to polymerization contraction. Therefore, many methods of adding a new operation for correcting the error have been proposed, but the operation has become more and more complicated and the cost has been increased.
Moreover, patients requiring justified teeth are older, there is a need to minimize the hospital number and chair time (time to sit couch). Therefore, to allow both simplicity and adaptation accuracy of definition tooth work made operation had new definition teeth work made art is desired.

[0005]

[Means for Solving the Problems]
Problems of teeth works made methods, considered to be a point requiring the correct form is difficult for a very long time making the mold, the point deformation of denture base by polymerization shrinkage of the polymerizable resin to be used is large, these As a result of research aimed at solving the above problem, the present invention has been completed. That is, the present invention provides a pre-prepared reference denture recess to be filled polymerizable resin composition which imparts the contact surface between the mouth luminal surface of該義tooth bed, a polymerizable resin composition to the tooth top (occlusal plane) the provided artificial teeth, and charging the recess of the artificial tooth
Providing define teeth work made set comprising a combination of polymerizable resin composition Hama. Further, the present invention, the polymerizable resin composition is applied to the contact surface with the oral surface of the standard denture base prepared in advance, and the applied surface of the polymerizable resin composition is adjusted to a compatible surface with the oral surface, Then, a person who polymerizes the polymerizable resin composition and further fills the recessed portion of the tooth top (occlusal surface) with the polymerizable resin composition.
Place the Koha to該義tooth floor, provides a method for manufacturing a definition teeth, characterized in that the polymerization of the polymerizable resin composition tooth top after adjusting the occlusion between artificial teeth (occlusal plane).

[0006] In the conventional denture base preparation, each denture base is individually prepared based on the oral model of the patient. However, in this method, the quality of the product is judged to be good or bad due to the technique of making a model and making a denture base from the model. In addition, since a large amount of polymerizable resin is required for producing a denture base from a model, the problem of polymerization shrinkage of the resin cannot be avoided. For this reason, the present inventors have pursued the production of an excellent denture base without using a denture base based on an oral model and succeeded in developing a new technique. In the present invention, a standard denture base prepared in advance is used.
That is, several kinds of denture bases are manufactured and prepared in large quantities in advance. Naturally, this standard denture base cannot be used even if it is applied to a patient as it is. The surface in contact with the reference denture mouth cavity surface in the present invention, the polymerizable resin was applied, the applied surface of the resin bonded to the oral cavity or oral cavity model of a patient. By this step, a denture base suitable for each patient is prepared.
By this step, it is no longer necessary to manufacture denture bases one by one from the oral cavity model, and the quality can be improved by greatly reducing the amount of the polymerizable resin used, while greatly simplifying the step.

The standard denture base of the present invention is made of acrylic resin, polystyrene, polyvinyl chloride resin, ABS, polycarbonate, epoxy resin, unsaturated polyester resin, and the like. A resin having a good affinity with the polymerizable adhesive used for fixing is suitable. Considering the economical efficiency and the convenience of the manufacturing process in the factory, the thermoplastic resin is more preferable, and the acrylic resin is most preferable. Polymethylmethacrylate may be used as such an acrylic resin, but it has better thermoplasticity,
It may be a copolymer of methylmethacrylate and another monomer in order to impart flexibility, toughness and the like. Also,
The method for molding the standard denture base is not particularly limited, but, for example, injection molding or compression molding can be used. In order to increase the adhesion area of the standard denture base with the polymerizable resin, it is preferable that the surface on which the resin is applied is provided with irregularities such as grooves and roughened at the manufacturing stage. Further, the user can observe the inside of the oral cavity of the patient to delete an unnecessary portion of the reference denture base or change the shape of the denture base by softening by heating.

As the polymerizable resin used in the present invention, resin compositions conventionally used for dentistry can be used without particular limitation.
Since the present polymerizable resin needs to be polymerized and cured after being adjusted to the surface compatible with the oral cavity, it is necessary to contain various polymerization catalysts. The polymerizable resin comprises a polymerizable monomer, a polymerization initiator and, if necessary, a polymer powder. As the polymerizable monomer, (meth) acrylic acid alkyl ester (alkyl group having 1 to 10 carbon atoms), polyalkylene glycol di (meth) acrylate (alkylene group having 2 to 20 carbon atoms), ethylene glycol oligomer di (meth)
Acrylate (2- to 10-mer), bisphenol A di (meth) acrylate, 2.2-bis [p- (r-methacryloxy-
β-hydroxypropoxy) phenyl] propane, 2,2
-Di- (4-methacryloxypolyethoxyphenyl) propane (2-10 ethoxy groups per molecule), trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, etc. (Meth) acrylic acid esters and urethane (meth) acrylic acid esters which are reaction products of 2 mol of (meth) acrylate having a hydroxyl group and 1 mol of diisocyanate, specifically, JP-B-55-33687 And JP Sho
56-152408 Monomers and Bisphenol A
It is preferable that 2 mol of diisocyanate is reacted with both ends of the ethylene glycol modified product and the 2 mol of (meth) acrylate having a hydroxyl group is bonded to both ends thereof.

The polymerization initiation catalyst may be a photopolymerization type or a thermal polymerization type. First, any conventionally known catalyst can be used as the photopolymerization initiation catalyst. For example, JP-A-48-498
No. 75 (camphorquinone and amine), JP-A-57-203007
No. (camphorquinone, organic peroxide and amine),
JP-A-60-26002 (camphorquinone, N, N-dimethylbenzoic acid alkyl ester), JP-A-60-149603 (camphorquinone, aldehyde and organic peroxide), JP-A-60-197609 ( Camphorquinone and mercaptan),
Japanese Patent Application No. 61-290780 (camphorquinone and azo compounds)
The initiators described in etc. can be used. Examples of the thermal polymerization initiating catalyst include initiators having a proper use temperature range of 40 to 100 ° C. and initiators such as tertiary amines having an aromatic group. These polymerization initiators are included in the composition on a weight basis.
It can be used in an amount within the range of 0.1 to 10%. The shape of this polymerizable resin is 1-pack type, 1-paste type, 2-pack type,
It may be a two-paste type or a powder-liquid type, but in the case of a catalyst system consisting of a peroxide and an amine, it is necessary to make them a two-liquid type or a two-paste type.

The polymer powder is not particularly limited, and is a homopolymer of a polymerizable monomer or a copolymer containing the same, or polyethylene, polypropylene, polybutadiene, polyvinyl chloride, polycarbonate, polystyrene, polymethylmethacrylate, nylon. , Polyurethane, polychloroprene, polyvinyl fluoride, cellulose tributyrate, cellulose trinitrate,
Polyethylene oxide, polyoxymethylene, polyacrylonitrile, collagen, polyvinyl alcohol, polyvinylidene chloride, polyvinyl butyral, epoxy resin, poly-4-methylpentene, polyester, phenol resin, urea resin, melanin resin, diallyl phthalate resin, silicone resin, etc. , A copolymer containing two or more repeating units constituting these polymers, a product obtained by subjecting these polymers to various cross-linking, or a blend of these polymers may be used. . Further, if necessary, a viscosity modifier, a colorant, a storage stabilizer, a preservative, a perfume and the like can be included.

Next, the artificial tooth used in the present invention, which has a recess for filling the polymerizable resin composition on the tooth top surface, that is, the occlusal surface, is one of the novel points of the present invention. Conventional artificial teeth have been adjusted to have a good occlusal surface by removing the top of the tooth after placement on the denture base. However, in this method, the process is complicated, and the quality of the deletion technique is good or bad. In contrast,
According to the present invention, since the top surface of the artificial tooth is filled with the flexible polymerizable resin, if the other artificial tooth is pressed against the resin, the shape of the top portion of the artificial tooth is transferred, so that it is polymerized as it is. It can be hardened to optimize the occlusal properties of the artificial teeth. The present technology can completely solve the above problems. The material of the artificial tooth used in the present invention may be the same as the material of the above-mentioned standard denture base, and is not particularly limited. It is desirable that the material has sufficient affinity with the polymerizable resin to be filled in the artificial tooth and the adhesive for attaching it to the artificial tooth. In terms of appearance and morphology, the side surface of the artificial tooth has a shape and color tone similar to those of a normal artificial tooth, and has a conical (mortar-like), hemispherical or cylindrical concave portion at the tooth top. The artificial tooth having this recess is not used for the entire surface of the denture base, but it is sufficient to use it for either the upper jaw or the lower jaw of the molar portion.

The polymerizable resin to be filled in the artificial tooth is composed of a polymerizable monomer, a polymerization initiator and, if necessary, a polymer powder or a reinforcing filler, and the polymerization initiator, the polymerizable monomer and the polymer powder have been described above. It is the same as the one described in the precision-fitting polymerizable resin. As the reinforcing filler, crystalline or amorphous quartz, containing silicon, aluminum and boron as main constituent components, and if necessary, further blended with various heavy metals such as barium, strontium, titanium, zirconium, zinc and lanthanum. Various kinds of glass, ultrafine particle silica, ultrafine particle alumina, and a material called an organic composite filler produced by mixing an ultrafine particle filler and a polymerizable monomer, polymerizing them, and then pulverizing them are used. The polymerization method of this polymerizable resin is preferably a photopolymerization type, and should be quickly polymerized when the shape of the occlusal surface is determined so that the shape is not deformed. Also, instead of keeping the artificial tooth fixed to the standard denture base from the beginning, place the artificial tooth via an adhesive in the hole or groove where the artificial tooth should be placed on the gum of the denture base, After adjusting and confirming the optimum position and angle, the denture base and the artificial tooth can be bonded and fixed.

A method for producing a denture base according to the present invention will be described. A standard denture base is prepared by the method described above, and this is fitted to the oral cavity model. Since there is a gap between the standard denture base and the oral cavity model, it must be eliminated by the polymerizable resin. As the polymerizable resin, various types can be used, from a paste type to a highly fluid type. In the case of a paste, it is possible to build up or coat the resin on a standard denture base and press the application surface and the oral cavity model to transfer the shape of the oral cavity model to the denture base. Then, the resin is polymerized and cured to fix the shape. The denture base thus obtained is attached to the patient's oral cavity. The higher the match between the oral model and the patient's mouth, the more comfortable the denture base can be made.

When the resin is in a liquid state, the standard denture base and the oral cavity model are combined, the resin is poured into the void, and then the resin is polymerized. If you remove the oral model from the denture base by an appropriate method,
The desired denture base is obtained. Yet another way is
It is also possible to directly transfer the shape of the oral cavity by applying a paste resin to the standard denture base and pressing it onto the oral cavity of the patient. By polymerizing the denture base removed from the patient's oral cavity, a denture base having excellent compatibility can be obtained.

[0015]

According to a manufacturing method of a defined teeth of the present invention, as compared with the conventional method, with fewer steps, good compatibility, it is possible to create a low cost justified teeth.

[0016]

[Example] The occlusal surface of a commercially available artificial tooth is 1-
A 3 mm cylindrical shape was removed, and an artificial tooth having a recess for adding a polymerizable resin on the occlusal surface side was prepared. A wax denture was prepared from an edentulous full-jaw model for educational training according to the standard method, one part of the denture contacting the mucous membrane was removed (in the case of the upper jaw, the entire palate part) was removed, and the artificial tooth was removed from the model. Original type. Next, molds were prepared from these original molds according to the conventional method, and the gingiva part of the denture base was prepared by compression-molding a copolymer resin of methyl methacrylate and 2-ethylhexyl acrylate (75:25), and its anterior teeth were prepared. A commercially available artificial tooth was arranged in the upper part and the upper molars, and an artificial tooth having the recess of the present invention was arranged in the lower molars to form a standard denture base. Further, as a part for the palate part, a part of which the shape was determined by pressing a softened 0.5 mm-thick plate of the above copolymer against a mold having the shape of the palate part was prepared.

A plaster work model based on an impression taken from a patient's mouth was attached to an articulator, and a denture base precisely fitted to a patient's mouth from a standard denture base was prepared in the following manner. First, after applying a separating agent to the working model, room temperature polymerization of polymethyl methacrylate, polyethyl methacrylate, methyl methacrylate, ethylene glycol dimethacrylate, benzoyl peroxide, and paratoluidine on the side of the standard denture base that contacts the mucosa. A mold of polymerizable resin was applied and it was attached to the working model at a position such that the artificial tooth was in the correct occlusal plane. At this time, the polymerizable resin was also applied to the parts of the palate, and the gum and palate were combined and integrated. The polymerizable resin was cured by leaving it at room temperature.

Next, after applying an adhesive to the artificial tooth recess,
Polymerizable resin containing reinforcing filler (Kuraray Co., Ceseed) was filled in the recess, and the occlusal surface of the artificial tooth was adjusted by engaging the articulator, and then the polymerizable resin was irradiated with light to polymerize. , The shape of the occlusal surface was fixed. Thereafter, the upper and lower definition tooth removed from the plaster model, remove the excess portion of extravasated from oral surfaces and occlusal surface, polished after trimmed the form to obtain <br/> righteousness teeth. The denture thus obtained showed very good compatibility with the oral cavity of the patient.

Claims (2)

(57) [Claims] 1. A pre-prepared reference denture, the該義tooth floor
Polymerizable resin composition which imparts the contact surface between the mouth cavity surface, the tooth top artificial tooth having a recess to be filled with a polymerizable resin composition (occlusal plane), and a polymerizable filling the recess of the artificial tooth resin
Righteousness tooth work made set of a combination of the composition. 2. A pre-prepared standard denture base with the oral surface
A polymerizable resin composition is applied to the contact surface , the application surface of the polymerizable resin composition is adjusted to a surface compatible with the oral surface, and then the polymerizable resin composition is polymerized, and the tooth top (occlusal surface) An artificial tooth having a recessed portion filled with a polymerizable resin composition is arranged on the denture base, and after adjusting the occlusion between the artificial teeth , the polymerizable resin composition of the tooth top (occlusion surface) is polymerized. a method for manufacturing a righteous teeth.