A method of manufacturing the gingival prosthesis

 

(57) Abstract:

The invention relates to medicine, namely prosthetic dentistry. A method of manufacturing the gingival prosthesis is in the pressing and curing of the siloxane compositions containing siloxane rubber, a filler, a polymerization initiator and pigments, with pre-siloxane composition is subjected to microwave irradiation using a microwave field 700-900 watts for 1 min, and the gingival prosthesis further comprises a second layer of acrylic base material and curing the two layers is realized under the action of microwave irradiation using field 700-900 watts for 3-5 minutes Siloxane composition and the acrylic base material it is desirable to take at a ratio of 2-3 layers:1. 2 C.p. f-crystals.

The invention relates to medicine, namely to prosthodontics.

In some cases, patients suffering from periodontal disease, there are phenomena of gingival recession, resulting in exposure of the tooth roots and open interdental spaces, accompanied by a noticeable aesthetic impairments and subsequently causing violations of phonetics.

A simple and effective means of correcting such Naro prosthesis by hot vulcanization cytoxanbuy composition, consisting of siloxane rubber, filler, vulcanization initiator and pigments. This siloxane composition pressed into a plaster mould with 3-fold of the control pressing and vulcanized under pressure at a temperature of 150oC for 75 minutes. To achieve the smooth surface of the gingival prosthesis that mimics the surface of the natural gum tissue, plaster mould previously isolated alginate varnish, which is dried for 12 hours [Schweiz Monatsschr Zahnmed. - 1990. - vol.100. The N8. -P. 3-12].

The disadvantage of this method are its duration and the multiple steps involved, and the necessity of applying the finished prosthesis of hairspray smoothness and Shine.

The closest to the invention is a method of polymerization of the siloxane composition (material Gingivamoll"), containing siloxane rubber, a filler, a polymerization initiator and a pigment under the action of the microwave field power 160 W for 8 min at 4 min, and further polymerization under the action of microwave energy at a power of 320 W 8 min [Dmitrieva L. A. and others - M., 2001].

However, this method does not allow you to brush up on the denture surface that retains the desired smoothness in terms funktsionalnogo "Gingivamoll", manufactured as described above, changes its appearance when in use, its surface becomes rough, changes color by absorbing oral fluids, and food residues.

The purpose of this invention is to improve the aesthetic properties and durability of gingival prosthesis by increasing its strength and smoothness of the surface.

This objective is achieved in that in the method of manufacturing the gingival prosthesis by extrusion and polymerization of the siloxane compositions containing siloxane rubber, a filler, a polymerization initiator and a pigment, the distinguishing feature is that pre-siloxane composition is subjected to microwave irradiation at a power field 700-900 watts for 1 min, the gingival prosthesis further comprises a second layer of acrylic base material and curing the two layers is realized under the action of microwave fields with the power of 700-900 W within 3-5 minutes it is Desirable that the ratio of siloxane layers and acrylic base material is 2-3:1. In addition, preferably, the siloxane composition was taken in the following ratio of components (wt.%):

Aerosil A-175 - 26,80-38,085

,-Dihydrexidine pigments 0,001-0,003

Siloxane rubber SKTV-S - Rest

As the acrylic base material can be used "Stomatal", "Ftoraks", "Ethacryl-02" and others.

Example 1

The gingival prosthesis with an elastic layer of the siloxane composition is made as follows. Gypsum wax model of gingival prosthesis in a ditch of radiotransparent material commonly accepted in the dental practice method. After setting plaster into the cuvette placed in the microwave to soften the wax for 30 s at a power of the microwave field is 700 watts. Then the cell open, remove the softened wax, the wax residue is boiled jet of boiling water, and subject to the prosthesis surface plaster moulds cover water separating varnish in three layers.

Prepare siloxane composition, which on cold rolls mixed to obtain a homogeneous plastic mass following components (wt.%):

Siloxane rubber SKTV-S - 54,79

Aerosil A-175 - 38,085

,-Dihydroxy-polydimethylsiloxane - 6,192

50% paste in silicone oil peroxide 2,4-dichlorobenzoyl - 0,93

Mineral pigments - 0.003

Siloxane composition is placed in a prepared plaster mould, the surface of the silicone composition is they pressure until the clamping halves of the cell, and leave under pressure under pressure 100-120 bar for 10-20 minutes. At this time prepare the acrylic base material "Stomatal", following the manufacturer's instructions. A cuvette containing pre-formed silicone composition is removed from the press, open and remove the separation of the polyethylene sheet. Then using a sharp knife cut off the top third feature silicone mass, freeing up space for acrylic base material, to obtain the ratio of layers of silicone-acrylate 2:1. The cell is closed and placed on a pallet rotary table microwave ovens. Include the mode of the pre-cured siloxane compositions: power - 700 watts, microwave irradiation - 1 min. Then the cell is removed from the microwave oven and uncover. The swollen molding of the base material "Stomatal" placed on top of the silicone composition and covering the cuvette again put it under a press for processing the outer layer of the prosthesis of acrylic material. After exposure of the cell under the pressure of her closed up fasten screws and placed on a rotating table microwave oven for the final joint polymerization of siloxane and acrylic base materials.

The final mode of the microwave on the Chi and leave to cool at room temperature for at least 1 hour. The finished denture is then removed from the plaster moulds, cut off the excess material around the edges of the prosthesis. To remove residual volatiles prosthesis is placed in a container with distilled water and perform additional processing in the microwave oven for 5 minutes when power microwave field is 700 watts. The top layer of the denture base material "Stomatal" polished by conventional methods.

Example 2

The gingival prosthesis with an elastic layer of the siloxane composition and the outer layer of the acrylic base material at a ratio of layers of 1:1 produced in example 1, but as the acrylic base material using the material "Ethacryl-02", and as filler in the siloxane composition is used Aerosil A-300, and siloxane composition is prepared in the following ratio of components (wt.%):

Siloxane rubber SKTV-S - 66,939

Aerosil A-175 - 26,80

,-Dihydroxy-polydimethylsiloxane and 5.36

50% paste in silicone oil peroxide 2,4-dichlorobenzoyl - 0,9

Mineral pigments - 0,001

The two-layer test specimens consisting of siloxane material and acrylic base material obtained by the proposed method showed that the adhesion strength when peeling of celexa is given the cohesive nature of exfoliation, provides a reliable connection of the layers of the prosthesis in the conditions of the oral cavity.

The outer surface of the gingival prosthesis, made of acrylic material, was allowed to complete the polishing of the restoration and preservation of the polished surface under the action functional loads and environment of the oral cavity.

Thus, the proposed method allows to obtain the gingival prostheses with high elasticity, durability and superior aesthetic properties, a smooth shiny surface.

1. A method of manufacturing the gingival prosthesis by extrusion and polymerization of the siloxane compositions containing siloxane rubber, a filler, a polymerization initiator and a pigment, wherein the pre-siloxane composition is subjected to microwave-training with power microwave fields 700-900 watts for 1 min, and the gingival prosthesis further comprises a second layer of acrylic base material and curing the two layers is realized under the action of microwave irradiation using field 700-900 watts for 3-5 minutes

2. The method according to p. 1, characterized in that the siloxane composition and the acrylic base material taken in the ratio of 2-3 layers:1.

3. The method according to p. 1, the l-175 - 26,80-38,085

- dihydroxyphenylalanine and 5.36-6,192

50% Paste in silicone oil peroxide 2,4-dichlorobenzoyl - 0,9-0,93

Mineral pigments - 0,001-0,003

Siloxane rubber SKTV-S - Ostalnoe

 

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SUBSTANCE: method involves cleaning abutment teeth from deposit using diamond drill. Saw cuts are made in the abutment teeth in parallel to dental axis. The cuts are treated with acid and adhesive system and filled with fluid composite material. Glass fiber material is cut in advance in strips and set into the saw cuts arranging directivity vector in perpendicular to dental axis building in this way fastening system from fiber glass where oppositely directed fibers are interwoven with each other. Then the fastening system is filled with the fluid composite material or resin. Stump is repaired with condensed composite. Final prosthesis modeling is carried out using micro-hybrid material. Post-bonding is carried out using arbitrary protector material.

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3 cl, 3 dwg

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