RU2396937C2 - Removable denture and method of its manufacturing - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention relates to field of orthopedic dentistry. Removable denture includes elastic pad and rigid basis with artificial teeth. Rigid basis is made from polyurethane composition based on di-isocyanate and polyatomic alcohol, where as di-isocyanate used is pseudoforpolymer, containing NCO-groups in amount 16.5-17.0%, and as polyatomic alcohol, used is polyoxypropylene and/or oligooxypropylene-polyatomic alcohols with definite molecular weight. Elastic pad of denture is made from polyurethane composition based on poly-isocyanate with content of NCO-groups from 2.2 to 33.1%, oligopolyatomic alcohol, such as oligooxypropylene glycol or olygooxypropylenetriol with moleculare weight from 500 to 5000, and catasyst - dibutyldilaurate of octoate of tin. Polyurethane compositions can contain additional components such as dyes, light-stabiliser, ethylene glycol, etc. Polyuretghane compositions, of which removable denture is made, and method of denture manufacturing ensure increase of removable denture basis hardness, increase of strength characteristics of denture material with simultaneous increase of service life of manufactured removable denture, as well as improvement of technological characteristics in process of denture manufacturing.

EFFECT: there is claimed removable denture and method of its manufacturing.

9 cl, 3 tbl, 2 ex

Description

The invention relates to medicine, in particular to orthopedic dentistry, to a removable denture and a method of manufacturing a removable denture and can be used in the manufacture of removable dentures with a rigid base, including using an elastic lining.

Known removable denture containing an elastic lining and a hard basis with artificial teeth, while the hard basis is made of a polyurethane composition based on diisocyanate and polyhydric alcohol, and the elastic lining is made of a polyurethane composition based on polyisocyanate, polyhydric alcohol and a catalyst, which is used tin dibutyl dilaurate or tin octoate (see RF Patent No. 2224481, IPC АС 13/08, 02/27/2004).

However, the known removable denture with its use has the following disadvantages:

- does not have a sufficient modulus of elasticity when bending the rigid base of a removable denture (2800-2900 MPa),

- does not have sufficient Charpy impact strength (17.8-18.0 kJ / m ² ),

- does not have a sufficient modulus of elasticity in tension of the rigid base of a removable denture (2750-2800 MPa),

- does not have sufficient hardness of the basis of a removable denture (75-77 conventional units on the Shore A scale),

- the material of the removable denture does not provide a sufficient life of the manufactured removable denture,

The objective of the invention is the creation of a removable denture.

The technical result is to increase the modulus of elasticity when bending the hard base of a removable denture, increase the toughness of the hard base of a removable denture, increase the modulus of elasticity when stretching the hard base of a removable denture, increase the hardness of the hard base of a removable denture, and ensure a sufficient life of the manufactured removable denture denture.

The technical result is achieved in that in the proposed removable denture containing an elastic lining and a hard basis with artificial teeth, the hard basis made of a polyurethane composition based on diisocyanate and polyhydric alcohol, and the elastic lining made of a polyurethane composition based on polyisocyanate, polyhydric alcohol and catalyst, which is used as tin dibutyl dilaurate or tin octoate, while in the polyurethane composition of a hard basis is used as diisoc diphenylmethanediisocyanate-based pseudo-prepolymer or oligooxypropylenediol-based pseudo-prepolymer, the pseudo-phenopolymer contains 16.5-17.0% NCO groups, and polyoxypropylenetetrol with a molecular weight of at least 270, or oligooxypropylene triol 370, or oligooxypropylene diol with a molecular weight of at least 500, or a mixture of polyoxypropylene triol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 500, or a mixture of oligoox ipropylene triol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 1000, or a mixture of oligooxypropylene triol with a molecular weight of at least 370 and oligooxypropylene tetrol with a molecular weight of at least 270, or a mixture of oligooxypropylene tetrol with a molecular weight of at least 270 and oligo dipropylene triole 500, or a mixture of oligooxypropylenetetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 1000 or a mixture of oligooxypropylene diol with a molecule yarnoy mass of at least 370, oligooksipropilentetrola with a molecular weight of not less than 270 and oligooksipropilendiola with a molecular weight of at least 500, with the following component ratio, mass parts .:

pseudophoropolymer one hundred polyhydric alcohol 20-152,

and in the polyurethane composition for the manufacture of an elastic lining layer, a polyisocyanate with an NCO group content of 2.2 to 33.1% is used as a polyisocyanate, as well as an oligopolyatomic alcohol oligoxypropylene glycol or oligoxypropylene triol with a molecular weight of from 500 to 5000 in a solution of the catalyst in oligopolyatomic alcohol, in the following ratios of components, parts by weight:

polyisocyanate containing NCO groups from 2.2 to 33.1% one hundred oligopolyatomic alcohol with a molecular weight of from 500 to 5000 25-1350 catalyst 0.01-0.15.

In this case, polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid base for a removable denture, as well as a solution of a catalyst in oligopolyatomic alcohol for the manufacture of an elastic lining layer of a rigid base for a removable denture, may additionally contain a bright ocher dye, pink Ж, red “H” or ruby SC in an amount of 0.002-0.1 parts by weight In this case, polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid base for a removable denture, as well as a solution of a catalyst in oligopolyatomic alcohol for the manufacture of an elastic lining layer of a rigid base for a removable denture, may additionally contain a light stabilizer, for example, benzene P in an amount of 0.1-0 5 parts by weight In this case, polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid basis for a removable denture may additionally contain ethylene glycol in an amount of 5.8-6.2 wt.h. In this case, the solution of the catalyst in oligopolyatomic alcohol for the manufacture of the lining layer of the hard basis of a removable denture may additionally contain ethylene glycol in an amount of 0.9-0.95 wt.h. or triethylene glycol in an amount of 2.2-2.3 wt.h. In this case, the solution of the catalyst in oligopolyatomic alcohol for the manufacture of a backing layer of a rigid base may additionally contain methylene-bis-orthochloraniline 9.0-18.9 wt.h. In this case, polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid base for a removable denture may additionally contain a foam stabilizer, for example, KEP-2A in an amount of 0.3 wt.h.

Among the essential features characterizing the proposed removable denture, the distinguishing ones are:

- the use in the polyurethane composition of a rigid basis as a diisocyanate of a pseudo-phosphoropolymer based on diphenylmethanediisocyanate or a pseudo-phosphopolymer based on oligooxypropylenediol, while the pseudo-phosphoropolymer contains NCO groups in the amount of 16.5-17.0%,

- the use of a rigid base as a polyhydric alcohol - polyoxypropylene tetrol with a molecular weight of at least 270, or oligooxypropylene triol with a molecular weight of at least 370, or oligooxypropylenediol with a molecular weight of at least 500, or a mixture of polyoxypropylene triol with a molecular weight of at least 370 and oligooxypropylene diol less than 500, or a mixture of oligooxypropylene triol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 1000, or a mixture of oligooxypropylene triol with m -molecular weight not less than 370 and oligooksipropilentetrola with a molecular weight of at least 270, or a mixture oligooksipropilentetrola with a molecular weight of not less than 270 and oligooksipropilendiola with a molecular weight of at least 500, or a mixture oligooksipropilentetrola with a molecular weight of not less than 270 and a molecular oligooksipropilendiola. weighing at least 1000 or a mixture of oligooxypropylene triol with a molecular weight of at least 370, oligooxypropylene tetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500,

- use in a polyurethane composition for the manufacture of an elastic lining layer of a polyisocyanate with a content of NCO groups from 2.2 to 33.1%,

- the use as oligopolyatomic alcohol oligoxypropylene glycol or oligoxypropylene triol with a molecular weight of from 500 to 5000 in a solution of the catalyst in oligopolyatomic alcohol,

- polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid base for a removable denture, as well as a solution of a catalyst in oligopolyatomic alcohol for the manufacture of an elastic lining layer of a rigid base for a removable denture, may additionally contain a bright ocher dye, pink Ж, red “N” or ruby SK in the amount of 0.002-0.1 parts by weight,

- polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid base for a removable denture, as well as a solution of a catalyst in oligopolyatomic alcohol for the manufacture of an elastic lining layer of a rigid base for a removable denture may additionally contain a light stabilizer, for example, benzene P in an amount of 0.1-0, 5 parts by weight

- polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid basis for a removable denture may additionally contain ethylene glycol in an amount of 5.8-6.2 parts by weight,

- a solution of the catalyst in oligopolyatomic alcohol for the manufacture of the lining layer of the hard base of a removable denture may additionally contain ethylene glycol in an amount of 0.9-0.95 wt.h. or triethylene glycol in an amount of 2.2-2.3 parts by weight,

- a solution of the catalyst in oligopolyatomic alcohol for the manufacture of a backing layer of a hard basis may additionally contain methylene-bis-orthochloraniline 9.0-18.9 parts by weight,

- polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid basis for a removable denture may additionally contain a foam stabilizer, for example KEP-2A in an amount of 0.3 wt.h.

Experimental and then clinical studies of the proposed removable denture showed its high efficiency. It was found that using all the essential features, an elastic modulus was increased on a rigid basis of a removable denture during bending of a hard basis to 3000-3090 MPa, Charpy impact strength increased to 18-19 kJ / m ² , tensile modulus increased 2900-3000 MPa, increasing hardness to 80-87 conventional units on the Shore A. scale. In addition, the life of the manufactured removable denture has been significantly (15-18%) increased.

The essence of the proposed technical solution is illustrated by table 1, which shows the compositions of the mixed components of the polyurethane composition used to make a rigid base of a removable denture, table 2, which shows the compositions of the mixed components of a polyurethane composition, used to make a lining layer of a hard base of a removable denture, and table 3 , which presents the physical and mechanical properties of the proposed removable denture.

The proposed removable dentures for various purposes are simple to understand and do not require the provision of drawings for their illustration.

The technology for their manufacture from the proposed polyurethane compositions is described below in the method of manufacturing removable dentures.

The invention relates to medicine, in particular to orthopedic dentistry, to methods for manufacturing a removable denture and can be used in the manufacture of removable dentures with a rigid base and elastic lining.

A known method of manufacturing removable dentures with an elastic lining, including preliminary modeling before modeling on a gypsum model of the wax structure of the future prosthesis, modeling on the gypsum model of the wax structure of the elastic structure of the future prosthesis, molding the gypsum model with the wax structure of a silicone elastic lining in a special molding cell using molding material duplicating silicone, keeping the molding material until it solidifies, disclosure cuvettes after solidification of the silicone backup mass, removal of wax from the gypsum model, isolation of the gypsum model with a polyurethane varnish containing 100 parts by weight polyurethane SKU-PFL, 18 parts by weight Dia-X (methylene-bis-orthochloraniline) and 30 parts by weight acetone, placing the gypsum model in the obtained form and forming the gate courses, pouring the components of the polyurethane composition containing the polyisocyanate, oligopolyatomic alcohol and catalyst into the prepared cell through the gate courses, using tin dibutyl dilaurate or tin octoate, keeping the polyurethane composition, opening to , cutting the molding material, removing the gypsum model with an elastic lining made on it, removing the sprues, followed by manufacturing gypsum models located thereon elastic lining design hard wax base double layer prosthesis with artificial teeth (see. Russian Patent №2224481, IPC A61S 13/08, 27.02.2004).

However, the known method of manufacturing a removable denture with its use has the following disadvantages:

- does not provide a removable denture with a sufficient modulus of elasticity when bending a rigid base (2800-2900 MPa),

- does not provide a removable denture with sufficient Charpy impact strength (17.8-18.0 kJ / m2),

- does not provide a removable denture with a sufficient modulus of elasticity under tension of a rigid base (2750-2800 MPa),

- does not provide a removable denture with sufficient hard base hardness (75-77 conventional units on the Shore A scale),

- does not provide a sufficient life of the manufactured removable denture,

- has a lack of adaptability in the process of practical manufacturing of a removable denture.

The objective of the invention is the creation of a method of manufacturing a removable denture with a rigid base and elastic lining.

The technical result is the provision of a removable denture with a sufficient modulus of elasticity when bending a rigid base, obtaining a removable denture with a sufficient Charpy impact strength, obtaining a removable denture with a sufficient modulus of elasticity when stretching a rigid base, obtaining a removable denture with sufficient hardness of a rigid basis ensuring a sufficient life of the manufactured removable denture, as well as improving manufacturability in the process of the manufacture of a removable denture.

The technical result is achieved by the fact that in the proposed method for the manufacture of removable dentures with a rigid base and an elastic lining, including preliminary modeling before modeling the wax structure of the future prosthesis on the plaster model of the wax structure of the elastic structure of the future prosthesis, molding the gypsum model with a silicone wax structure elastic lining in a special molding cuvette with the use of a backup ilikona, maintaining the molding material prior to its solidification, the disclosure cuvette after curing silicone duplicating weight, removal of wax from the plaster model, the plaster model insulating polyurethane varnish comprising 100 parts by weight polyurethane SKU-PFL, 18 parts by weight diameter-X (Mitlenbis-ortho-chloraniline) and 30 parts by weight acetone, placing the gypsum model in the obtained form and forming the gate courses, pouring the components of the polyurethane composition containing the polyisocyanate, oligopolyatomic alcohol and catalyst into the prepared cell through the gate courses, using tin dibutyl dilaurate or tin octoate, keeping the polyurethane composition, opening to , cutting the molding material, removing the gypsum model with an elastic lining made on it, removing the sprues, followed by manufacturing on a gypsum model with an elastic lining of a wax construction on it of a rigid basis of a two-layer prosthesis with artificial teeth, the gypsum model is dried in a heating cabinet at first at a temperature of 80 ° C for 60 minutes, then at a temperature of 120 ° C for 60 minutes, use in the manufacture of wax models, wax gates with a diameter of 8-10 mm, a special molding cuvette is box-shaped with rounded edges and equipped with a lid, while one side of the box cuvette is straight and is equipped with three openings for the placement of the sprues, and on the shape of the manufactured removable denture passing into the narrowing rounded part of the cuvette, holes are made to fill it with molding material as duplicate silicone, the artificial teeth are pre-dried and degreased before they are placed in accordance with their prints in the form obtained , three layers of insulating polyurethane varnish are applied to the gypsum model, each of which is first dried at room temperature for 5 mi ut and then in the oven, the model with the first two layers is dried at a temperature of 60 ° C for 30 minutes, and with the last layer of varnish is dried at a temperature of 120 ° C for 30 minutes, the model is coated with silicone release agent before pouring the initial components with polyurethane into the cuvette compositions preheat the container-mixer with the starting components in an upright position at a temperature of 60 ° C for 40 minutes, which then cools to room temperature in 60 minutes, model and a silicone mold are heated with artificial with my teeth in a heating cabinet at a temperature of 120 ° C for 20 minutes, place the assembled cuvette in the polymerizer, insert the container with the mixer with the initial components of the polyurethane composition into the dispenser, and after releasing the outlet openings of the mixer container, fill the cuvette with a thin stream of the polyurethane composition until the polyurethane composition leaves the polyurethane composition anti-casting holes, and the cuvette immediately placed in the polymerizer is subjected to air pressure treatment at a pressure of 2 in a sealed polymerizer atm for 5 minutes without filling the internal volume of the polymerization agent with water, while in the polyurethane composition of a hard basis, a pseudo-prepolymer based on diphenylmethanediisocyanate or a pseudo-prepolymer based on oligooxypropylenediol is used as a diisocyanate, while the pseudo-prepolymer contains NCO groups in the amount of 16.5-17.0% and as a polyhydric alcohol - polyoxypropylenetetrol with a molecular weight of at least 270, or oligooxypropylene triol with a molecular weight of at least 370, or oligooxypropylene diol with molecular weight at least 500, or a mixture of polyoxypropylene triol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 500, or a mixture of oligooxypropylene diol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 1000, or a mixture of oligooxypropylene diol with a molecular weight of at least 370 and oligooxypropylenetetrol with a molecular weight of at least 270, or a mixture of oligooxypropylenetetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500, or a mixture of ol gooxypropylenetetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 1000, or a mixture of oligooxypropylene triol with a molecular weight of at least 370, oligooxypropylene tetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500, with the following ratios: .:

pseudophoropolymer one hundred polyhydric alcohol 20-152,

and in the polyurethane composition for the manufacture of an elastic lining layer, a polyisocyanate with an NCO group content of 2.2 to 33.1% is used as a polyisocyanate, as well as an oligopolyatomic alcohol oligoxypropylene glycol or oligoxypropylene triol with a molecular weight of from 500 to 5000 in a solution of the catalyst in oligopolyatomic alcohol, in the following ratios of components, parts by weight:

polyisocyanate containing NCO group 2.2 to 33.1% one hundred oligopolyatomic alcohol with a molecular weight of from 500 to 5000 25-1350 catalyst 0.01-0.15,

then the filled cuvette is heated in a heating cabinet at a temperature of 120 ° C for 40 minutes before disassembling. In this case, when molding a gypsum model with a wax model, two sprues are installed in a special cuvette in the manufacture of the lower jaw prosthesis and three sprues in the manufacture of the upper jaw prosthesis, while the sprues are selected with a length of 4-5 mm.

Among the essential features characterizing the proposed method of manufacturing a removable denture, the distinguishing ones are:

- performing the drying of the made gypsum model in a heating cabinet, first at a temperature of 80 ° C for 60 minutes, then at a temperature of 120 ° C for 60 minutes,

- use in the manufacture of wax models of wax gates with a diameter of 8-10 mm,

- performing a special box-shaped molding cuvette with rounded edges and equipping it with a lid, while one side of the box-shaped cuvette is straight and equipped with three openings for placing gates, and holes are made on the shape of the removable denture passing into the tapering rounded part of the cuvette filling as a molding material with duplicate silicone,

- artificial teeth before they are placed according to their prints in the obtained form are pre-dried and degreased,

- applying to the gypsum model three layers of insulating polyurethane varnish, each of which is dried first at room temperature for 5 minutes and then into the oven in the model with the first two layers is dried at 60 ° C for 30 minutes, and with the last layer of varnish is dried at temperature of 120 ° C for 30 minutes,

applying silicone release agent to the model,

- before pouring into the cuvette the initial components of the polyurethane composition, the container mixer is preheated with the initial components in an upright position at a temperature of 60 ° C for 40 minutes, which then cools to room temperature in 60 minutes, the model and the silicone mold with artificial teeth are heated in a heat cabinet at a temperature of 120 ° C for 20 minutes,

- placement in the polymerizer of the collected cell,

- placing the container-mixer with the initial components of the polyurethane composition in the dispenser and after releasing the outlet openings of the container-mixer, filling the cuvette with a thin stream of the polyurethane composition until the polyurethane composition exits the anti-sprue holes,

- the implementation is placed in a sealed space of the polymerization pressure treatment of the filled cell with air at a pressure of 2 atm for 5 minutes without filling the internal volume of the polymerizer with water,

- the use in the polyurethane composition of a rigid basis as a diisocyanate of a pseudo-phosphoropolymer based on diphenylmethanediisocyanate or a pseudo-phosphopolymer based on oligooxypropylenediol, while the pseudo-phosphoropolymer contains NCO groups in the amount of 16.5-17.0%,

- use as a polyhydric alcohol - polyoxypropylenetetrol with a molecular weight of at least 270, or oligooxypropylene triol with a molecular weight of at least 370, or oligooxypropylene diol with a molecular weight of at least 500, or a mixture of polyoxypropylene triol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 370 or a mixture of oligooxypropylene triol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 1000, or a mixture of oligooxypropylene triol with a molecular weight at least 370 and oligooxypropylenetetrol with a molecular weight of at least 270, or a mixture of oligooxypropylenetetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500, or a mixture of oligooxypropylene tetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 270 and oligooxypropylene triol with a molecular weight of at least 370, oligooxypropylene tetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500,

- selection of the following ratios of components, parts by weight:

pseudophoropolymer one hundred polyhydric alcohol 20-152,

- use in a polyurethane composition for the manufacture of an elastic lining layer as a polyisocyanate polyisocyanate with an NCO group content of from 2.2 to 33.1%,

- the use as oligopolyatomic alcohol oligoxypropylene glycol or oligoxypropylene triol with a molecular weight of from 500 to 5000 in a solution of the catalyst in oligopolyatomic alcohol,

- selection of the following ratios of components, parts by weight:

polyisocyanate containing NCO groups from 2.2 to 33.1% one hundred oligopolyatomic alcohol with a molecular weight of from 500 to 5000 25-1350 catalyst 0.01-0.15,

- heating the filled cell before disassembling in the oven at a temperature of 120 ° C for 40 minutes,

- installation of molding a gypsum model with a wax model in a special cuvette of two sprues in the manufacture of the lower jaw prosthesis and three sprues in the manufacture of the upper jaw prosthesis, while the sprues are selected with a length of 4-5 mm.

The method is as follows.

In the manufacture of removable dentures with an elastic lining before modeling on a plaster model of the wax structure of the future prosthesis, preliminary modeling is performed on the plaster model of the wax structure of the elastic lining of the future prosthesis. The gypsum model is molded with the wax structure of the silicone elastic lining into a special molding cuvette using duplicating silicone as the molding material. Maintain the molding material until it solidifies, open the cuvette after solidification of the silicone backup mass. The wax is removed from the gypsum model and the gypsum model is isolated with a polyurethane varnish containing 100 parts by weight. polyurethane SKU-PFL, 18 parts by weight Dia-X (methylene-bis-orthochloraniline) and 30 parts by weight acetone. The plaster model is placed in the obtained form and the gate runs are formed.

In the prepared cell, the components of the polyurethane composition are poured through the gateways. At the same time, in the polyurethane composition for the manufacture of an elastic lining layer, polyisocyanate with a content of NCO groups from 2.2 to 33.1% is used as a polyisocyanate, as well as oligopolyatomic alcohol oligooxypropylene glycol or oligooxypropylene triol with a molecular weight of 500 to 5000 in a catalyst solution in oligopolyatomic alcohol, in the following ratios of components, parts by weight:

polyisocyanate containing NCO groups from 2.2 to 33.1% one hundred oligopolyatomic alcohol with a molecular weight of from 500 to 5000 25-1350 catalyst 0.01-0.15

As a catalyst, tin dibutyl dilaurate or tin octoate are used.

Withstand the polyurethane composition. Then the filled cell before disassembling is heated in a heating cabinet at a temperature of 120 ° C for 40 minutes. The cuvette is opened, the molding material is cut. The gypsum model with the elastic lining made on it is removed, the sprues are removed. Subsequent manufacture is performed on a plaster model with an elastic lining of the wax structure on it of a rigid basis for a two-layer prosthesis with artificial teeth.

An impression of the prosthetic part of the oral cavity is obtained. In this case, the made gypsum model is dried in an oven first at a temperature of 80 ° C for 60 minutes, then at a temperature of 120 ° C for 60 minutes. The wax structure of the future prosthesis is modeled on a plaster model using wax gates with a diameter of 8-10 mm in the manufacture of wax models. A plaster model with a wax prosthesis structure is formed into a special molding cuvette using duplicating silicone as the molding material.

The special molding cuvette is box-shaped with rounded edges and equipped with a lid, while one side of the box-shaped cuvette is straight and equipped with three openings to accommodate the sprues, and holes are made on the shape of the removable denture passing into the tapering rounded part of the cuvette to fill it in as a molding material with duplicate silicone.

Maintain the molding material until it solidifies. The cuvettes are opened after solidification of the silicone backup mass and the wax is removed from the gypsum model. The gypsum model is isolated with polyurethane varnish containing 100 parts by weight. polyurethane SKU-PFL, 18 parts by weight Dia-X (methylene-bis-orthochloraniline) and 30 parts by weight acetone. At the same time, three layers of an insulating polyurethane varnish are applied to the gypsum model, each of which is dried first at room temperature for 5 minutes and then in the oven with the first two layers, dried at 60 ° C for 30 minutes, and dried with the last layer of varnish at a temperature of 120 ° C for 30 minutes.

The gypsum model is coated with silicone release agent and placed in the form obtained and the gate runs are formed. In this case, when molding a gypsum model with a wax model, two sprues are installed in a special cuvette in the manufacture of the lower jaw prosthesis and three sprues in the manufacture of the upper jaw prosthesis, while the sprues are selected with a length of 4-5 mm.

The artificial teeth are placed according to their prints in the obtained form and the cuvette is assembled. Artificial teeth before they are placed according to their prints in the obtained form are pre-dried and degreased.

In the prepared cuvette, through the gateways, pour the components of a polyurethane composition based on diisocyanate and polyhydric alcohol to form a rigid base. In this case, before pouring into the cuvette the starting components of the polyurethane composition, the container mixer is preheated with the starting components in an upright position at a temperature of 60 ° C for 40 minutes, which then cools to room temperature in 60 minutes. The model and the silicone mold with artificial teeth are heated in an oven at a temperature of 120 ° C for 20 minutes. And immediately place the assembled cuvette in the polymerization unit, insert the container with the mixer with the initial components of the polyurethane composition into the dispenser, and after releasing the outlet openings of the container mixer, fill the cuvette with a thin stream of the polyurethane composition until the polyurethane composition exits the anti-cast hole. Then, the cuvette immediately placed in the polymerizer is subjected to air pressure treatment at a pressure of 2 atm for 5 minutes in a sealed polymerizer without filling the internal volume of the polymerizer with water.

When filling the cuvette with a rigid base polyurethane composition, a pseudo-phosphoropolymer based on diphenylmethanediisocyanate or a pseudo-phosphopolymer based on oligooxypropylenediol is used as a diisocyanate, while the pseudo-phenopolymer contains NCO groups in the amount of 16.5-17.0%, and polyoxypropylene is a non-molecular weight polyoxypropylene less than 270, or oligooxypropylene triol with a molecular weight of at least 370, or oligooxypropylene diol with a molecular weight of at least 500, or a mixture of polyoxypropylene triol with molecular weight at least 370 and oligooxypropylenediol with a molecular weight of at least 500, or a mixture of oligooxypropylene diol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 1000, or a mixture of oligooxypropylene diol with a molecular weight of at least 370 and oligooxypropylenetetrol with at least 270, a mixture of oligooxypropylenetetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500, or a mixture of oligooxypropylene tetrol with a molecular weight of at least 270 and oligooxy propylene diol with a molecular weight of at least 1000 or a mixture of oligooxypropylene diol with a molecular weight of at least 370, oligooxypropylene tetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500, with the following ratios of components, parts by weight:

pseudophoropolymer one hundred polyhydric alcohol 20-152.

A denture with a rigid base is removed from the polyurethane composition after cooling of the cuvette and its opening. The sprues are removed and the finished denture is finally treated.

Experimental and then technological studies of the proposed method for manufacturing a removable denture showed its high efficiency. It was found that using all the essential features, it was possible to obtain a removable denture base with a sufficient modulus of elasticity when bending a rigid base, to obtain a removable denture with a sufficient Charpy impact strength, to obtain a removable denture with a sufficient elastic modulus when stretching a rigid base, to obtain a removable a denture with sufficient hardness of a rigid base, and also achieved a sufficient life of the manufactured removable denture but. At the same time, an increase in manufacturability was achieved in the process of practical technological manufacturing of removable dentures.

The essence of the proposed technical solution is illustrated in table 1, which shows the miscible components of the polyurethane composition used in the manufacture of a rigid base of a removable denture, table 2, which shows the miscible components of a polyurethane composition used in the manufacture of a backing layer of a rigid base of a removable denture, and table 3, where the properties of removable dentures made by the proposed method are presented.

The essence of the proposed method is also illustrated by examples of implementation.

Example 1. Made the manufacture of a removable denture of the upper jaw with a rigid base.

An impression of the prosthetic upper jaw of the oral cavity was obtained. At the same time, the gypsum model made on the print was dried in a thermal cabinet at a temperature of first 80 ° C for 60 minutes, then at a temperature of 120 ° C for 60 minutes. The wax design of the future prosthesis was modeled on the gypsum model, followed by the manufacture of wax gates with a diameter of 8 mm. A gypsum model with a wax prosthesis design was molded into a molding cuvette using duplicating silicone as a molding material. In this case, a forming cuvette made in a box-shaped form with rounded edges and equipped with a cover was used, while one side of the box-shaped cuvette was straight and equipped with three openings for placing sprues, and holes were made on the shape of the removable denture passing into the tapering rounded part of the cuvette filling it as a molding material with duplicate silicone.

The molding mass was maintained until it solidified. The cuvette was opened after solidification of the silicone backup mass and the wax was removed from the gypsum model. The gypsum model was isolated with polyurethane varnish containing 100 parts by weight. polyurethane SKU-PFL, 18 parts by weight Dia-X (methylene-bis-orthochloraniline) and 30 parts by weight acetone. At the same time, 3 layers of an insulating polyurethane varnish were applied to the gypsum model, each of which was first dried at room temperature for 5 minutes and then in a thermal cabinet the model with the first layers was dried at 60 ° C for 30 minutes, and with the last layer of varnish was dried at a temperature of 120 ° C for 30 minutes.

The gypsum model was coated with silicone release agent and placed in the resulting form. In this case, when molding a gypsum model with a wax model, three sprues were installed in a special cuvette.

The artificial teeth were placed according to their prints in the obtained form and the cuvette was assembled. Artificial teeth before they were placed according to their prints in the obtained form were previously dried and degreased.

In the prepared cuvette, the components of the polyurethane composition based on diisocyanate and polyhydric alcohol were poured through the gateways to form a rigid base, the compositions of which are shown in Table 1. In this case, before pouring the initial components of the polyurethane composition into the cuvette, the container mixer was preheated with the initial components in a vertical position at temperature of 60 ° C for 40 minutes, which was then cooled to room temperature in 60 minutes. The model and the silicone mold with artificial teeth were heated in a thermal cabinet at a temperature of 120 ° C for 20 minutes. And immediately the collected cuvette was placed in the polymerization unit, the container with the initial components of the polyurethane composition was inserted into the dispenser, and after the outlet openings of the container were released, the mixer was put on and the cuvette was filled with a thin stream of the polyurethane composition until the polyurethane composition exited the anti-casting holes. Then, the filled cuvette immediately placed in the polymerizer was subjected to air pressure treatment at a pressure of 2 atm for 5 minutes in a sealed polymerizer without filling the internal volume of the polymerizer with water. A denture with a rigid base was removed from the polyurethane composition after cooling and opening the cuvette. The sprues were removed and the finished denture was finally processed.

Example 2. Made the manufacture of a removable denture of the lower jaw with a rigid base and with an elastic lining. In the manufacture of removable dentures with an elastic lining before modeling on the plaster model of the wax structure of the future prosthesis, we performed preliminary modeling on the plaster model of the wax structure of the elastic lining of the future prosthesis. The gypsum model was formed with the wax structure of the elastic lining in the molding cuvette using duplicating silicone as the molding material. The molding mass was maintained until it solidified, the cuvette was opened after solidification of the silicone backup mass. The wax was removed from the gypsum model and the gypsum model was isolated with a polyurethane varnish containing 100 parts by weight. polyurethane SKU-PFL, 18 parts by weight Dia-X (methylene-bis-orthochloraniline) and 30 parts by weight acetone. Covered model release silicone grease. We placed the gypsum model in the obtained form and formed the sprue passages. Before pouring into the molding cuvette the initial components of the polyurethane composition, the container mixer was preheated with the initial components in an upright position and the container mixer was cooled to room temperature. The model and the silicone mold were heated in a thermal cabinet at a temperature of 120 ° C for 20 minutes. The collected cuvette was placed in the polymerization unit and the molding cuvette was filled with a thin jet of polyurethane composition until the polyurethane composition exited from the anti-casting holes. At the same time, components of the polyurethane composition were poured into the prepared cuvette through the sprue passages to form an elastic lining, the compositions of which are shown in Table 2. And the cuvette immediately placed in the polymerizer was subjected to air pressure treatment at a pressure of 2 atm for 5 minutes without filling the internal volume polymerization water. The elastic lining was removed from the polyurethane composition after cooling and opening the cuvette. Gates removed.

Then an impression of the prosthetic lower jaw of the oral cavity with a previously made elastic lining was obtained. At the same time, the gypsum model made on the print was dried in a thermal cabinet at a temperature of first 80 ° C for 60 minutes, then at a temperature of 120 ° C for 60 minutes. The wax structure of the future prosthesis was modeled on the gypsum model, followed by the manufacture of wax gates with a diameter of 10 mm. A gypsum model with a wax prosthesis design was molded into a molding cuvette using duplicating silicone as a molding material. In this case, a forming cuvette made in a box-shaped form with rounded edges and equipped with a cover was used, while one side of the box-shaped cuvette was straight and equipped with three openings for placing sprues, and holes were made on the shape of the removable denture passing into the tapering rounded part of the cuvette filling it as a molding material with duplicate silicone.

The molding mass was maintained until it solidified. The cuvette was opened after solidification of the silicone backup mass and the wax was removed from the gypsum model. The gypsum model was isolated with polyurethane varnish containing 100 parts by weight. polyurethane SKU-PFL, 18 parts by weight Dia-X (methylene-bis-orthochloraniline) and 30 parts by weight acetone. At the same time, 3 layers of an insulating polyurethane varnish were applied to the gypsum model, each of which was first dried at room temperature for 5 minutes and then in the thermal cabinet the model with the first layers was dried at 60 ° C for 30 minutes, and with the last layer of varnish was dried at a temperature of 120 ° C for 30 minutes.

The gypsum model was coated with silicone release agent and placed in the resulting form. In this case, when molding a gypsum model with a wax model, two sprues were installed in a special cuvette.

The artificial teeth were placed according to their prints in the obtained form and the cuvette was assembled. Artificial teeth before they were placed according to their prints in the obtained form were previously dried and degreased.

In the prepared cuvette, the components of the polyurethane composition based on diisocyanate and polyhydric alcohol were poured through the gateways to form a rigid base, the compositions of which are shown in Table 1. In this case, before pouring the initial components of the polyurethane composition into the cuvette, the container mixer was preheated with the initial components in a vertical position at temperature of 60 ° C for 40 minutes, which was then cooled to room temperature in 60 minutes. The model and the silicone mold with artificial teeth were heated in a thermal cabinet at a temperature of 120 ° C for 20 minutes. And immediately the collected cuvette was placed in the polymerization unit, the container with the initial components of the polyurethane composition was inserted into the dispenser, and after the outlet openings of the container were released, the mixer was put on and the cuvette was filled with a thin stream of the polyurethane composition until the polyurethane composition exited the anti-casting holes. Then, the filled cuvette immediately placed in the polymerizer was subjected to air pressure treatment at a pressure of 2 atm for 5 minutes in a sealed polymerizer without filling the internal volume of the polymerizer with water. A denture with a rigid base was removed from the polyurethane composition after cooling and opening the cuvette. The sprues were removed and the finished denture was finally processed.

Mixed components of the polyurethane composition for the manufacture of a removable denture used to manufacture the rigid base of a removable denture (table 1) No.
rial The basis is diisocyanate (with the content of NCO groups), 100 wt. parts Polyhydric alcohol (with a molecular weight of at least), wt. parts Dye, wt. parts Light stabilizer, wt. parts Ethylene glycol, wt. parts Foam stabilizer, wt. parts one Diphenylmethane-diisocyanate-based pseudophore polymer (16.5%) 152 mph polyoxypropylenetetrol (270) 0.08 mph
Light ocher 0.1 mph Benazola P 5.8 0.3 mph
KEP-2A 2 Diphenylmethane-diisocyanate-based pseudophore polymer (17.0%) 90 mph oligooxypropylene triol (370) 0.03 mph Ruby SK no 6.0 0.3 mph
KEP-2A 3 Diphenylmethane-diisocyanate-based pseudophore polymer (16.8%) 20 tsp oligooxypropylene diol (500) 0.1 mph
Light ocher 0.5 mph Benazola P 6.2 0.3 mph
KEP-2A four Diphenylmethane-diisocyanate-based pseudophore polymer (16.5%) 20 mph mixtures of polyoxypropylene triol (370) and oligooxypropylene diol (500) 0.04 mph Pink F 0.1 mph Benazola P 5.8 no 5 Diphenylmethane-diisocyanate-based pseudophore polymer (17.0%) 90 mph mixtures of oligo-oxypropylene triol (370) and oligo-oxypropylene diol (1000) 0.05 mph Scarlet "N" 0.5 mph Benazola P 6.0 0.3 mph
KEP-2A 6 Diphenylmethane-diisocyanate-based pseudophore polymer (16.8%) 152 mph mixtures of oligo-oxypropylene triol (370) and oligo-oxypropylene tetrol (270) 0.002 mph Scarlet "N" 0.3 mph Benazole P Benazole P 6.2 no 7 Diphenylmethane-diisocyanate-based pseudophore polymer (16.5%) 152. m.h. mixtures of oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (500) 0.1 mph Ruby SK no 5.8 0.3 mph
KEP-2A 8 Diphenylmethane-diisocyanate-based pseudophore polymer (17.0%) 90 mph mixtures of oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (1000) 0.06 mph Pink F no no no 9 Diphenylmethane-diisocyanate-based pseudophore polymer (16.8%) 20 mph mixtures of oligo-oxypropylene triol (370), oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (500) 0.002 mph Light ocher 0.3 mph Benazole P 6.2 0.3 mph
KEP-2A 10 Pseudoforpolymer based on oligooxypropylenediol (16.8%) 152 mph Polyoxypropylenetetrol (270) 0.08 mph Light ocher 0.1 mph Benazole P 5.8 no eleven Pseudoforpolymer based on oligooxypropylenediol (16.5%) 90 mph Oligooxypropylene triol (370) 0.03 mph Ruby SK no no 0.3 mph KEP-2A 12 Pseudoforpolymer based on oligooxypropylenediol (17.0%) 20 mph Oligooxypropylenediol (500) 0.1 mph Ocher
bright 0.3 mph Benazole P 6.2 no 13 Pseudoforpolymer based on oligooxypropylenediol (16.5%) 20 mph mixtures of polyoxypropylene triol (370) and oligooxypropylene diol (500) 0.04 mph Pink F 0.5 mph Benazole P 5.8 0.3 mph KEP-2A fourteen Pseudoforpolymer based on oligooxypropylenediol (17.0%) 90 mph mixtures of oligo-oxypropylene triol (370) and oligo-oxypropylene diol (1000) 0.05 mph
Scarlet "N" no 6.0 no fifteen Pseudoforpolymer based on oligooxypropylenediol (16.8%) 152 mph mixtures of oligo-oxypropylene triol (370) and oligo-oxypropylene tetrol (270) 0.002 mph Scarlet "N" 0.25 mph Benazole P 6.2 0.3 mph KEP-2A 16 Pseudoforpolymer based on oligooxypropylenediol (16.8%) 152. m.h. mixtures of oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (500) 0.1 mph Ruby SK 0.1 mph Benazole P no 0.3 mph KEP-2A 17 Pseudoforpolymer based on oligooxypropylenediol (17.0%) 90 mph mixtures of oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (1000) 0.06 mph Pink F no 6.0 0.3 mph KEP-2A eighteen Pseudoforpolymer based on oligooxypropylenediol (16.5%) 20 mph mixtures of oligo-oxypropylene triol (370), oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (500) 0.002 mph Light ocher Benazole P 6.2 0.3 mph
KEP-2A 19 Pseudoforpolymer based on oligooxypropylenediol (17.0%) 152 mph polyoxypropylenetetrol (270) 0.08 mph Light ocher 0.1 mph Benazola P 5.8 0.3 mph
KEP-2A twenty Pseudoforpolymer based on oligooxypropylenediol (16.5%) 90 mph oligooxypropylene triol (370) 0.03 mph Ruby SK no 6.0 0.3 mph
KEP-2A 21 Pseudoforpolymer based on oligooxypropylenediol (16.8%) 20 mph oligooxypropylene diol (500) 0.1 mph Light ocher 0.5 mph Benazola P 6.2 0.3 mph
KEP-2A 22 Pseudoforpolymer based on oligooxypropylenediol (17.0%) 20 mph mixtures of polyoxypropylene triol (370) and oligooxypropylene diol (500) 0.04 mph Pink F 0.1 mph Benazola P 5.8 no 23 Pseudoforpolymer based on oligooxypropylenediol (16.5%) 90 mph mixtures of oligo-oxypropylene triol (370) and oligo-oxypropylene diol (1000) 0.05 mph
Scarlet "N" 0.5 mph Benazola P 6.0 0.3 mph
KEP-2A 24 Pseudoforpolymer based on oligooxypropylenediol (16.8%) 152 mph mixtures of oligo-oxypropylene triol (370) and oligo-oxypropylene tetrol (270) 0.002 mph Scarlet "N" 0.3 mph Benazole P Benazole P 6.2 no 25 Pseudoforpolymer based on oligooxypropylenediol (17.0%) 152. m.h. mixtures of oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (500) 0.1 mph
Ruby SK no 5.8 0.3 mph
KEP-2A 26 Pseudoforpolymer based on oligooxypropylenediol (16.5%) 90 mph mixtures of oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (1000) 0.06 mph Pink F no 6.0 no 27 Pseudoforpolymer based on oligooxypropylenediol (16.8%) 20 mph mixtures of oligo-oxypropylene triol (370), oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (500) 0.002 mph Light ocher 0.3 mph Benazole P 6.2 0.3 mph
KEP-2A 28 Diphenylmethane-diisocyanate-based pseudophore polymer (16.8%) 152 mph Polyoxypropylenetetrol (270) 0.08 mph Light ocher 0.1 mph Benazole P 5.8 no 29th Diphenylmethane-diisocyanate-based pseudophore polymer (17.0%) 90 mph Oligooxypropylene triol (370) 0.03 mph Ruby SK no no 0.3 mph
KEP-2A thirty Diphenylmethane-diisocyanate-based pseudophore polymer (16.5%) 20 mph Oligooxypropylenediol (500) 0.1 mph Light ocher 0.3 mph Benazole P 6.2 no 31 Diphenylmethane-diisocyanate-based pseudophore polymer (16.8%) 20 mph mixtures of polyoxypropylene triol (370) and oligooxypropylene diol (500) 0.04 mph Pink F 0.5 mph Benazole P 5.8 0.3 mph
KEP-2A 32 Diphenylmethane-diisocyanate-based pseudophore polymer (17.0%) 90 mph mixtures of oligo-oxypropylene triol (370) and oligo-oxypropylene diol (1000) 0.05 mph
Scarlet "N" no 6.0 no 33 Diphenylmethane-diisocyanate-based pseudophore polymer (16.5%) 152 mph mixtures of oligo-oxypropylene triol (370) and oligo-oxypropylene tetrol (270) 0.002 mph Scarlet "N" 0.25 mph Benazole P 6.2 0.3 mph KEP-2A 34 Diphenylmethane-diisocyanate-based pseudophore polymer (16.8%) 152. m.h. mixtures of oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (500) 0.1 mph Ruby SK 0.1 mph Benazola P no 0.3 mph KEP-2A 35 Diphenylmethane-diisocyanate-based pseudophore polymer (17.0%) 90 mph mixtures of oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (1000) 0.06 mph Pink F no 6.0 0.3 mph KEP-2A 36 Diphenylmethane-diisocyanate-based pseudophore polymer (16.5%) 20 mph mixtures of oligo-oxypropylene triol (370), oligo-oxypropylenetetrol (270) and oligo-oxypropylene diol (500) 0.002 mph
Light ocher Benazole P 6.2 0.3 mph KEP-2A

Mixed components of the polyurethane composition for the manufacture of a removable denture, used for the manufacture of the lining layer of the hard base of a removable denture (table 2) Material No. Polyisocyanate (with the content of NCO-groups), 100 wt. parts Oligopolyatomic alcohol catalyst solution (with molecular weight), wt. parts The catalyst in a solution of oligopolyatomic alcohol, wt. parts Dye, wt. parts Additives, wt. parts one Oligoalkylene polydiisocyanate 2.2 wt.% NCO-groups 1350 mph Oligooxypropylene glycol (500) 0.15 mph tin dibutyl dilaurate 0.08 mph Light ocher 18.9 mph methylene bis ortho-chloramine 2 Oligoalkylene polydiisocyanate 2.2 wt.% NCO-groups 700 mph Oligooxypropylene glycol (2000) 0.07 mph tin dibutyl dilaurate 0.03 mph Ruby SK 0.1 mph Benazola P 3 Oligoalkylene polydiisocyanate 2.2 wt.% NCO-groups 25 mph Oligooxypropylene glycol (5000) 0.01 mph tin dibutyl dilaurate 0.1 mph Light ocher 9.0 mph methylene bis ortho-chloramine four Oligoalkylene polydiisocyanate 2.2 wt.% NCO-groups 1350 mph Oligooxypropylene triol (500) 0.15 mph tin octoate 0.04 mph Pink F 2.2 mph triethylene glycol 5 Oligoalkylene polydiisocyanate 2.2 wt.% NCO-groups 700 mph Oligooxypropylene triol (2000) 0.07 mph tin octoate 0.05 mph Scarlet "N" 2.3 mph triethylene glycol 6 Oligoalkylene polydiisocyanate 2.2 wt.% NCO-groups 25 mph Oligooxypropylene triol (5000) 0.01 mph tin octoate 0.002 mph Scarlet "N" 0.9 mph ethylene glycol 7 Oligoalkylene polydiisocyanate 8.4 wt.% NCO groups 25 mph Oligooxypropylene glycol (500) 0.15 mph tin dibutyl dilaurate 0.1 mph Ruby SK 0.95 mph ethylene glycol 8 Oligoalkylene polydiisocyanate 8.4 wt.% NCO groups 700 mph Oligooxypropylene glycol (2000) 0.07 mph tin dibutyl dilaurate 0.06 mph Pink 18.9 mph methylene bis orthochloramine 9 Oligoalkylene polydiisocyanate 8.4 wt.% NCO groups 1350 mph Oligooxypropylene glycol (5000) 0.01 mph tin dibutyl dilaurate 0.002 mph
Light ocher 13.4 mph methylene bis orthochloramine 10 Oligoalkylene polydiisocyanate 8.4 wt.% NCO groups 1350 mph Oligooxypropylene triol (500) 0.15 mph tin octoate 0.08 mph Light ocher 9.0 mph methylene bis ortho-chloramine eleven Oligoalkylene polydiisocyanate 8.4 wt.% NCO groups 700 mph Oligooxypropylene triol (2000) 0.07 mph tin octoate 0.03 mph Ruby SK 0.5 mph Benazola P 12 Oligoalkylene polydiisocyanate 8.4 wt.% NCO groups 25 mph Oligooxypropylene triol (5000) 0.01 mph tin octoate 0.1 mph
Light ocher 13.4 parts by weight methylene bis orthochloramine 13 Oligoalkylene polydiisocyanate 14.3 wt.% NCO-groups 25 mph Oligooxypropylene glycol (500) 0.15 mph tin dibutyl dilaurate 0.04 mph Pink F 9.0 parts by weight methylene bis orthochloramine fourteen Oligoalkylene polydiisocyanate 14.3 wt.% NCO-groups 700 mph Oligooxypropylene glycol (2000) 0.07 mph tin dibutyl dilaurate 0.05 mph Scarlet "N" 2.2 mph triethylene glycol fifteen Oligoalkylene polydiisocyanate 14.3 wt.% NCO-groups 1350 mph Oligooxypropylene glycol (5000) 0.01 mph tin dibutyl dilaurate 0.002 mph Scarlet "N" 2.3 mph triethylene glycol 16 Oligoalkylene polydiisocyanate 14.3 wt.% NCO groups 1350 mph Oligooxypropylene triol (500) 0.15 mph tin octoate 0.1 mph Ruby SK 0.9 mph ethylene glycol 17 Oligoalkylene polydiisocyanate 14.3 wt.% NCO groups 700 mph Oligooxypropylene triol (2000) 0.07 mph tin octoate 0.06 mph Pink F 0.95 mph ethylene glycol eighteen Oligoalkylene polydiisocyanate 14.3 wt.% NCO groups 25 mph Oligooxypropylene triol (5000) 0.01 mph tin octoate 0.002 mph
Light ocher 18.9 mph methylene bis orthochloramine 19 Oligoalkylene polydiisocyanate 20.8 wt.% NCO groups 1350 mph Oligooxypropylene glycol (500) 0.15 mph tin dibutyl dilaurate 0.08 mph
Light ocher 18.9 mph methylene bis orthochloramine twenty Oligoalkylene polydiisocyanate 20.8 wt.% NCO groups 700 mph Oligooxypropylene glycol (2000) 0.07 mph tin dibutyl dilaurate 0.03 mph Ruby SK 0.1 mph Benazola P 21 Oligoalkylene polydiisocyanate 20.8 wt.% NCO groups 25 mph Oligooxypropylene glycol (5000) 0.01 mph tin dibutyl dilaurate 0.1 mph
Light ocher 9.0 mph methylene bis orthochloramine 22 Oligoalkylene polydiisocyanate 20.8 wt.% NCO groups 1350 mph Oligooxypropylene triol (500) 0.15 mph tin octoate 0.04 mph Pink F 2.2 mph triethylene glycol 23 Oligoalkylene polydiisocyanate 20.8 wt.% NCO groups 700 mph Oligooxypropylene triol (2000) 0.07 mph tin octoate 0.05 mph Scarlet "N" 2.3 mph triethylene glycol 24 Oligoalkylene polydiisocyanate 20.8 wt.% NCO groups 25 mph Oligooxypropylene triol (5000) 0.01 mph tin octoate 0.002 mph Scarlet "N" 0.9 mph ethylene glycol 25 Oligoalkylene polydiisocyanate 27.0 wt.% NCO groups 25 mph Oligooxypropylene glycol (500) 0.15 mph tin dibutyl dilaurate 0.1 mph Ruby SK 0.95 mph ethylene glycol 26 Oligoalkylene polydiisocyanate 27.0 wt.% NCO groups 700 mph Oligooxypropylene glycol (2000) 0.07 mph tin dibutyl dilaurate 0.06 mph Pink F 18.9 mph methylene bis orthochloramine 27 Oligoalkylene polydiisocyanate 27.0 wt.% NCO groups 1350 mph Oligooxypropylene glycol (5000) 0.01 mph tin dibutyl dilaurate 0.002 mph Light ocher 13.4 mph methylene bis orthochloramine 28 Oligoalkylene polydiisocyanate 27.0 wt.% NCO groups 1350 mph Oligooxypropylene triol (500) 0.15 mph tin octoate 0.08 mph Light ocher 9.0 mph methylene bis orthochloramine 29th Oligoalkylene polydiisocyanate 27.0 wt.% NCO groups 700 mph Oligooxypropylene triol (2000) 0.07 mph tin octoate 0.03 mph Ruby SK 0.5 mph Benazola P thirty Oligoalkylene polydiisocyanate 27.0 wt.% NCO groups 25 mph Oligooxypropylene triol (5000) 0.01 mph tin octoate 0.1 mph Light ocher 13.4 parts by weight methylene bis orthochloramine 31 Oligoalkylene polydiisocyanate 33.1 wt.% NCO-groups 25 mph Oligooxypropylene glycol (500) 0.15 mph tin dibutyl dilaurate 0.04 mph Pink F 9.0 parts by weight methylene bis orthochloramine 32 Oligoalkylene polydiisocyanate 33.1 wt.% NCO-groups 700 mph Oligooxypropylene glycol (2000) 0.07 mph tin dibutyl dilaurate 0.05 mph
Scarlet "N" 2.2 mph triethylene glycol 33 Oligoalkylene polydiisocyanate 33.2 wt.% NCO-groups 1350 mph Oligooxypropylene glycol (5000) 0.01 mph tin dibutyl dilaurate 0.002 mph Scarlet "N" 2.3 mph triethylene glycol 34 Oligoalkylene polydiisocyanate 33.1 wt.% NCO-groups 1350 mph Oligooxypropylene triol (500) 0.15 mph tin octoate 0.1 mph Ruby SK 0.9 mph ethylene glycol 35 Oligoalkylene polydiisocyanate 33.1 wt.% NCO-groups 700 mph Oligooxypropylene triol (2000) 0.07 mph tin octoate 0.06 mph Pink F 0.95 mph ethylene glycol 36 Oligoalkylene polydiisocyanate 33.1 wt.% NCO-groups 25 mph Oligooxypropylene triol (5000) 0.01 mph tin octoate 0.002 mph Light ocher 18.9 mph methylene bis orthochloramine

Physico-mechanical properties of the rigid basis of the manufactured removable denture (table 3) Material No. polyurethane composition used to make a rigid base for a removable denture (examples from table 1) polyurethane composition used for the manufacture of the lining layer of the hard basis of a removable denture (examples from table 2) Flexural modulus, MPa Charpy impact strength, kJ / m ² Tensile modulus, MPa Hardness, conventional units on Shore A scale one Example 1 Example 1 3000 18.0 2900 76 2 Example 2 Example 2 3050 18.9 2950 75 3 Example 3 Example 3 3090 18.7 2960 77 four Example 4 Example 4 3080 18.7 2930 76 5 Example 5 Example 5 3040 18.2 2970 76 6 Example 6 Example 6 3050 18,4 2970 75 7 Example 7 Example 7 3040 18.9 2960 76 8 Example 8 Example 8 3070 19.0 2930 75 9 Example 9 Example 9 3000 18.7 2950 77 10 Example 10 Example 10 3090 18.2 2970 76 eleven Example 11 Example 11 3080 18,4 2970 77 12 Example 12 Example 12 3080 18.8 2930 75 13 Example 13 Example 13 3050 18.9 2930 77 fourteen Example 14 Example 14 3040 18,4 2950 75 fifteen Example 15 Example 15 3000 18.9 2970 75 16 Example 16 Example 16 3090 18.6 2960 76 17 Example 17 Example 17 3080 18.6 2930 78 eighteen Example 18 Example 18 3050 18.0 2950 77 19 Example 19 Example 19 3070 18.7 2970 76 twenty Example 20 Example 20 3000 18.2 2970 75 21 Example 21 Example 21 3090 18,4 2960 77 22 Example 22 Example 22 3050 18.7 2970 76 23 Example 23 Example 23 3080 18.2 2930 75 24 Example 24 Example 24 3040 18,4 2970 76 25 Example 25 Example 25 3000 18.0 2960 77 26 Example 26 Example 26 3070 18.9 2950 77 27 Example 27 Example 27 3080 18.7 3000 75 28 Example 28 Example 28 3090 18.9 2930 76 29th Example 29 Example 29 3000 18,4 2990 77 thirty Example 30 Example 30 3040 18.9 2960 77 31 Example 31 Example 31 3050 18.6 2990 75 32 Example 32 Example 32 3040 18.6 2960 77 33 Example 33 Example 33 3090 18.0 2990 75 34 Example 34 Example 34 3070 18.7 2990 77 35 Example 35 Example 35 3000 18.2 2930 75 36 Example 36 Example 36 3080 18,4 2950 76

Claims (9)

1. A removable denture containing an elastic lining and a hard basis with artificial teeth, while the hard basis is made of a polyurethane composition based on diisocyanate and polyhydric alcohol, and the elastic lining is made of a polyurethane composition based on polyisocyanate, polyhydric alcohol and a catalyst, the quality of which tin dibutyl dilaurate or tin octoate is used, characterized in that a diphenyl-based pseudo-phosphor polymer is used as a diisocyanate in a rigid base polyurethane composition ethanediisocyanate or a pseudophoropolymer based on oligooxypropylene diol, while the pseudophoropolymer contains NCO groups in the amount of 16.0-17.0%, and as a polyhydric alcohol, polyoxypropylenetetrol with a molecular weight of at least 270, or oligooxypropylene triol with a molecular weight of at least 370, or oligo with a molecular weight of at least 500, or a mixture of polyoxypropylene triol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 500, or a mixture of oligooxypropylene triol with a molecular weight of not m 370 and oligooxypropylenediol with a molecular weight of at least 1000, or a mixture of oligooxypropylene triol with a molecular weight of at least 370 and oligooxypropylene tetrol with a molecular weight of at least 270, or a mixture of oligooxypropylene tetrol with a molecular weight of at least 270 and oligooxypropylene diol of at least 500 with molecular weight or with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 1000 or a mixture of oligooxypropylene triol with a molecular weight of at least 370, oligooxypropylene etrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500, with the following ratios of components, parts by weight:
pseudophoropolymer one hundred polyhydric alcohol 20-152
and in the polyurethane composition for the manufacture of an elastic lining layer, polyisocyanate with an NCO group content of 2.2 to 33.1% is used as a polyisocyanate, as well as oligo polypropyl alcohol oligo hydroxypropylene glycol or oligo hydroxypropylene triol with a molecular weight of from 500 to 5000 in a solution of the catalyst in oligopolyatomic alcohol, in the following ratios of components, parts by weight:
Polyisocyanate with content NCO groups from 2.2 to 33.1% one hundred Oligopolyatomic alcohol with a molecular weight of from 500 to 5000 25-1350 Catalyst 0.01-0.15 2. A removable denture according to claim 1, characterized in that the polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid base of a removable denture, as well as a solution of a catalyst in oligopolate for the manufacture of an elastic lining layer of a rigid base of a removable denture may further comprise dye ocher light, pink F, scarlet “H”, or ruby SC in an amount of 0.002-0.1 parts by weight 3. A removable denture according to claim 1, characterized in that the polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid base of a removable denture, as well as a solution of a catalyst in oligopolate for the manufacture of an elastic lining layer of a rigid base of a removable denture may further comprise light stabilizer, for example benzene P in an amount of 0.1-0.5 wt.h. 4. A removable denture according to claim 1, characterized in that the polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid base of a removable denture may additionally contain ethylene glycol in an amount of 5.8-6.2 wt.h. 5. A removable denture according to claim 1, characterized in that the solution of the catalyst in oligopolyatomic alcohol for the manufacture of the lining layer of the hard base of the removable denture may additionally contain ethylene glycol in an amount of 0.9-0.95 wt.h. or triethylene glycol in an amount of 2.2-2.3 wt.h. 6. The removable denture according to claim 1, characterized in that the solution of the catalyst in oligopolyatomic alcohol for the manufacture of a backing layer of a hard basis may additionally contain methylene-bis-orthochloraniline 9.0-18.9 wt.h. 7. A removable denture according to claim 1, characterized in that the polyhydric alcohol or a solution of a catalyst in polyhydric alcohol for the manufacture of a rigid basis for a removable denture may further comprise a foam stabilizer, for example KEP-2A in an amount of 0.3 parts by weight 8. A method of manufacturing removable dentures with an elastic lining, including preliminary modeling before modeling on a gypsum model of a wax structure of a future prosthesis, modeling on a gypsum model of a wax structure of an elastic lining of a future prosthesis, molding a gypsum model with a wax structure of a silicone elastic lining into a special molding cuvette using the quality of the molding material of the backup silicone, keeping the molding material until it solidifies, opening the cuvette after solidification of the silicone backup mass, removal of wax from the gypsum model, isolation of the gypsum model with a polyurethane varnish containing 100 parts by weight polyurethane SKU-PFL, 18 parts by weight diameter-X (Mitlenbis-ortho-chloraniline) and 30 parts by weight acetone, placing the gypsum model in the obtained form and forming the gate courses, pouring into the prepared cell through the gate courses the components of the polyurethane composition containing polyisocyanate, oligopolyatomic alcohol and a catalyst, using tin dibutyl dilaurate or tin octoate, keeping the polyurethane composition, opening to , cutting the molding material, removing the gypsum model with an elastic lining made on it, removing the sprues, followed by manufacturing on a gypsum model with an elastic lining of the wax structure on it of a rigid basis of a two-layer prosthesis with artificial teeth, characterized in that the gypsum model is dried in a heating cabinet at a temperature of 80 ° C first for 60 minutes, then at 120 ° C for 60 min, wax gates with a diameter of 8-10 mm are used in the manufacture of wax models, a special molding cuvette is box-shaped with rounded edges and equipped with a lid, while one side of the box cuv The bows are made straight and equipped with three openings for placement of the sprues, and the holes made to form a removable denture passing into the tapering rounded part of the cuvette are filled with duplicating silicone as molding material, artificial teeth before they are placed according to their prints in the obtained form previously dried and degreased, three layers of insulating polyurethane varnish are applied to the gypsum model, each of which is dried first at room temperature 5 minutes and then in a heating cabinet, the model with the first two layers is dried at a temperature of 60 ° C for 30 minutes, and with the last layer of varnish is dried at a temperature of 120 ° C for 30 minutes, the model is coated with silicone release agent before pouring into the cuvette of the starting components of the polyurethane composition is preheated with a mixer container with the starting components in a vertical position at a temperature of 60 ° C for 40 minutes, which then cools to room temperature in 60 minutes, the model and the silicone mold are heated using With artificial teeth, in a heating cabinet at a temperature of 120 ° С for 20 min, the assembled cuvette is placed in the polymerization unit, the mixer container with the initial components of the polyurethane composition is inserted into the dispenser, and after the outlet openings of the mixer container are filled, the cuvette is filled with a thin stream of the polyurethane composition until the polyurethane composition leaves the polyurethane composition counter-casting openings, and the cuvette immediately placed in the polymeriser is subjected to air pressure treatment in a sealed polymeriser under pressure and 2 atm for 5 min without filling the internal volume of the polymerization agent with water, while in the polyurethane composition of a hard basis, a pseudo-prepolymer based on diphenylmethanediisocyanate or a pseudo-phosphopolymer based on oligooxypropylenediol is used as a diisocyanate, while the pseudo-prepolymer contains 16.5-17 NCO groups, 0%, and as a polyhydric alcohol - polyoxypropylenetetrol with a molecular weight of at least 270, or oligooxypropylene triol with a molecular weight of at least 370, or oligooxypropylene diol with a molecular m cso is at least 500, or a mixture of polyoxypropylene triol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 500, or a mixture of oligooxypropylene diol with a molecular weight of at least 370 and oligooxypropylene diol with a molecular weight of at least 1000, or a mixture of oligooxypropylene diol with a molecular weight of at least 370 and oligooxypropylenetetrol with a molecular weight of at least 270, or a mixture of oligooxypropylenetetrol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500, or a mixture of ligooxypropylenetetrol with a molecular weight of at least 270 and oligooxypropylenediol with a molecular weight of at least 1000 or a mixture of oligooxypropylene diol with a molecular weight of at least 370, oligooxypropylene diethanol with a molecular weight of at least 270 and oligooxypropylene diol with a molecular weight of at least 500, with the following ratios. :
pseudophoropolymer one hundred polyhydric alcohol 20-152
and in the polyurethane composition for the manufacture of an elastic lining layer, polyisocyanate with an NCO group content of 2.2 to 33.1% is used as a polyisocyanate, as well as oligo polypropyl alcohol oligo hydroxypropylene glycol or oligo hydroxypropylene triol with a molecular weight of from 500 to 5000 in a solution of the catalyst in oligopolyatomic alcohol, in the following ratios of components, parts by weight:
Polyisocyanate with content NCO groups from 2.2 to 33.1% one hundred Oligopolyatomic alcohol with a molecular weight of from 500 to 5000 25-1350 Catalyst 0.01-0.15
then the poured cuvette is heated before disassembling in a heating cabinet at a temperature of 120 ° C for 40 minutes. 9. The method according to claim 8, characterized in that when molding the gypsum model with a wax model, two sprues are installed in a special cuvette in the manufacture of the lower jaw prosthesis and three sprues in the manufacture of the upper jaw prosthesis, the sprues being selected with a length of 4-5 mm.