Method for manufacturing clasp carcasses

FIELD: medical engineering.

SUBSTANCE: method involves taking anatomical imprint from jaw under prosthetic repair, casting supergypsum model for carrying out parallelometric studies, model duplication, modeling future clasp carcass skeleton from wax, enclosing the wax model into cell filled with gypsum, evaporating wax and filling the arisen cavity with polymer. The clasp carcass model is reproduced as metal one from polymer model for all models taken in production. Polymer for manufacturing clasp carcass model is reactive composition hardening at room temperature and composed of two ingredients taken in 2:1 proportion by weight. The first ingredient portion is based on polymethyl methacrylate, and the second one is polymethyl methacrylate with dimethylaniline added in the amount of 1-2% by mass.

EFFECT: significantly accelerated carcass manufacturing process; high accuracy in reproducing sizes; improved connection of locks and telescopic crowns to polymer carcass; low production costs.

 

The invention relates to medicine, namely to prosthetic dentistry and is intended for use in the manufacture of clasp frames, bridges and crowns.

Known manufacturing methods clasp frame, the closest one is the modeling of wax on a regular plaster model transfer in double-a reproduction of a thermoplastic material (polyamide) [1].

The disadvantages of the prototype are: the duration of the process, the complexity of the stage of translation thermoplastic frame in metal, the lack of accuracy of the transfer size and the inability connection lock fastenings and telescopic crowns with a polymer frame, the impossibility of complete (ashless) burning when translating polymer frame in metal, large material costs, and cost of the whole work.

The purpose of the present invention is to reduce the time of manufacture of clasp frame, simplifying the stage of translation thermoplastic frame in metal, more accurate transmission of sizes and ensuring connections of interlocking fasteners and telescopic crowns with a polymer frame, ensuring complete (ashless) burning when translating polymer frame in metal, saving material costs and cost reduction of the whole work.

The technical result of the invention is achieved by the fact that thermoplastic the initial material (polyamide) is replaced by the polymer composition on the basis of polymethylmethacrylate. Polymer composition for the manufacture of clasp frame consists of two parts: a and B. When mixed in appropriate weight ratios, the composition is cured at room temperature for 8-10 minutes (curing time is adjusted by selection of the ratio of parts a and B). Time 10 min is optimal for the manufacture of clasp frame. Part a polymeric composition is prepared on the basis of methyl methacrylate, which can be obtained by disposing of waste plexiglass its depolymerization [2], the method of suspension polymerization [3]. Part B polymer compositions for the manufacture of clasp frame represents a methyl methacrylate content of dimethylaniline in the amount of 1-2% (wt.). In the manufacture of polymer clasp frame optimal ratio of parts a and B is 2:1 (weight parts).

The method is as follows: after removing cast from the denture to the jaw molded model of super plasters. In this model, the corresponding lines are drawn using the template available on the model of the undercut is filled with hot wax, saddle-shaped part of the model superimposed plate clasp wax. The resulting model duplicating silicone mass. Next on the plaster model of the wax creates a skeleton of the future clasp frame, hipoteca the special dental cuvette and evaporated wax. Formed during the last operation the void is filled with the reactive polymer composition on the basis of poly (A+B), which cures at room temperature in a 2:1 ratio. Within 8-10 min is complete polymerization, which reduces the production time of the clasp frame simplifies the translation stage thermoplastic frame in metal, just passes the parameters of the frame, provides the connection lock fastenings and telescopic crowns with a polymer frame, provides full (ashless) burning when translating polymer frame in metal, saves material costs and reduces all the work.

Thus obtained polymer model clasp frame is extracted from the cell and finally polished to be transferred to the metal by the method of casting on the model.

Sources of information

1. Coshow M.I. Method of manufacture of clasp frames. - A.S. 1664303, USSR from 22.03.91,

2. Kuznetsov, E.V., Devgun S.M., Budarina L.A. and other Workshop on chemistry and physics of polymers. - M. - Chemistry. - 1977. - 256 S.

3. Nikolaev A.F. Synthetic polymers and plastics based on them. - M., L. - 1966. - 768 S.

A method of manufacturing a clasp frame, including removal of anatomical replica of the denture to the jaw, casting model of super plasters, which are parallelomania, do the regulation model, modeling wax skeleton of the future clasp frame, sagipsul wax reproductions in the cuvette evaporation of wax and filling the resulting cavity with polymer, the translation model of clasp skeleton of the polymer in metal casting, characterized in that for the manufacture of clasp skeleton of the polymer used cured at room temperature reactive composition of the two parts in a weight ratio of 2:1, while the first part is a poly (methyl methacrylate), manufactured on the basis of methyl methacrylate, and the second - methyl methacrylate content of dimethylaniline in the amount of 1-2 wt.%.



 

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FIELD: medical engineering.

SUBSTANCE: method involves taking anatomical imprint from jaw under prosthetic repair, casting supergypsum model for carrying out parallelometric studies, model duplication, modeling future clasp carcass skeleton from wax, enclosing the wax model into cell filled with gypsum, evaporating wax and filling the arisen cavity with polymer. The clasp carcass model is reproduced as metal one from polymer model for all models taken in production. Polymer for manufacturing clasp carcass model is reactive composition hardening at room temperature and composed of two ingredients taken in 2:1 proportion by weight. The first ingredient portion is based on polymethyl methacrylate, and the second one is polymethyl methacrylate with dimethylaniline added in the amount of 1-2% by mass.

EFFECT: significantly accelerated carcass manufacturing process; high accuracy in reproducing sizes; improved connection of locks and telescopic crowns to polymer carcass; low production costs.

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