RU2261698C1 - Silicon composition for producing underlying layer of removable dental prosthesis and the removable dental prosthesis - Google Patents

Abstract

FIELD: medicine; medical engineering.

SUBSTANCE: composition has polydimethylvinyl siloxane rubber, filler, silica hydride and platinum catalyst. 3-[(2-oxypropyl methacrylate)aminopropyl]-triethyl silicoformate and stain are optionally included. The ingredients are taken in known proportions. The prosthesis has acryl base and underlying layer under the base produced from the said composition. The composition allows producing underlying layers of high adhesion to prosthesis base.

EFFECT: improved service characteristics.

2 cl, 2 tbl

Description

The invention relates to orthopedic dentistry, in particular to silicone compositions used to form an elastic lining in the manufacture of removable dentures.

A known composition based on silicone rubber, intended for the manufacture of an elastic lining under the basis of removable dentures (RU, patent No. 2187286, A 61 K 6/093, 2002). The composition includes silicone rubber - polydimethylsiloxane rubber, metal oxides - modified silicon oxide, pigment, catalyst, polydimethylsiloxane, glass microspheres, surfactant-glycerin or polyoxymethylene siloxane, additionally contains silicon oxide, alumina and aluminum hydroxide as metal oxides, and use as a catalyst tin dibutyl dilaurate, ethyl silicate, gamma-aminopropyltriethoxysilane and alkenyltrimethoxysilane in the following components, wt. %:

Polydimethylsiloxane rubber - 46.57-48.65

Polydimethylsiloxane - 14.46-14.49

Modified Silica - 3.7-4.545

Silica - 8.64-8.9

Alumina - 0.94-1.047

Aluminum hydroxide - 4.76-4.86

Glass microspheres - 5.12-5.47

Surfactant-glycerin or polyoxymethylene siloxane - 5.68-6.88

Pigment - 0.082-0.34

Tin Dibutyl Dilaurate - 1.57-1.83

Ethyl silicate - 2.89-3.14

Gamma-aminopropyltriethoxysilane - 1.4-1.49

Alkenyltrimethoxysilane 1.16-1.35.

The disadvantages of the known composition include low adhesion of the lining to a rigid acrylic base and low strength indicators.

Also known is a composition for creating an elastic gasket under the basis of a removable denture based on siloxane rubber, including a filler (metal oxide), pigments and crosslinking agents (SU, copyright certificate No. 427706, A 61 C 9/00, 1974).

The composition allows to obtain an elastic lining, but has a low viability and a low degree of adhesion to the substrate, which negatively affects the operational properties of a removable denture.

The closest analogue is a composition based on siloxane rubber, including silica filler, silica and platinum catalyst (DE, application No. 22989822, A 61 C 9/00, 1974)

This composition has a high curing rate, and the resulting products have low hardness and high elasticity. However, low adhesion to the acrylic base is a very significant drawback of the known solution, which reduces the operational properties of a removable denture.

The objective of the invention is the creation of compositions for the manufacture of an elastic lining with high adhesion to the basis of the prosthesis and the provision of high functional and operational properties of a removable denture for a long time.

The problem for the composition is solved due to the fact that the composition for forming the lining layer under the base of removable dentures, including polydimethylmethyl vinyl siloxane rubber, filler, silicon hydride and platinum catalyst, additionally contains 3 - [(2-hydroxypropyl methacrylate) aminopropyl] -triethoxysilane in the following ratio components, wt. hours:

Polydimethylmethylvinylsiloxane rubber - 100.0 Filler - 16.2-25.8 Silica hydride - 1-3 Platinum catalyst - 5.10 ^-4 -5.10 ^-2 3 - [(2-hydroxypropyl methacrylate) aminopropyl] triethoxysilane -1-3

The problem for a removable denture is solved due to the fact that it contains an acrylic base and a lining layer under the basis formed from a composition based on siloxane rubber, and the composition for forming the lining layer under the basis includes, by weight. hours:

Polydimethylmethylvinylsiloxane rubber - 100.0 Filler - 16.2-25.8 Silica hydride - 1-3 Platinum catalyst - 5.10 ^-4 -5.10 ^-2 3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane -1-3

In addition, the composition for forming the lining layer may further contain a dye in an amount of 1 · 10 ^-4 -1.5 · 10 ^-5 wt. h

The technical result from the use of the invention is the creation of gaskets from compositions having, along with high elasticity, high adhesion to the base of the prosthesis, which provides good functional and operational properties of a removable denture for a long time, as well as ease of use.

As rubber, the composition may contain a polyorganosilicate of the formula CH ₂ = CH [Si (R ₂ ) 0] ₄ Si (R ₂ ) -CH = CH ₂ with a viscosity of 500-300000 cP at 25 ° C.

As a filler, modified aerosil, silica powder, zinc oxide, diatomite can be used.

Pt complexes and compounds (platinum-1,3 divinyltetramethyldisiloxane), metal carbonyls can be used as a platinum catalyst.

If necessary, obtain a colored elastic layer, the composition may contain dye in an amount of 1.10 ^-4 -1.10 ^-5 wt. h

The invention is illustrated by the examples shown in table 1.

Example 1. In a laboratory mixer is loaded polydimethylmethylvinyl siloxane rubber with a viscosity of 150,000 cP in an amount of 100.0 wt. hours; modified aerosil with a specific surface of 50 m ² / g - 25.8 wt. hours; organohydrosiloxane of the general formula HO [Si (H) + εt0] ₄ -H - 3 wt. hours. The components are mixed for 20 minutes, after which the resulting mixture is unloaded into a container. Then a mixture of the following composition is prepared: polydimethylmethylvinylsiloxane rubber with a viscosity of 150,000 cP - 100.0 parts by weight, modified aerosil with a specific surface of 50 m ² / g - 25.8 wt. hours; the catalyst is platinum - 1.3 divinyltetramethyldisiloxane - 5.10 ^-2 wt. hours; 3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane - 3 parts by weight

All ingredients are mixed for 20 minutes, after which the resulting mixture is discharged from the mixer. The resulting two compositions are mixed in a ratio of 1: 1 until a homogeneous mass is obtained for 2-3 minutes.

The composition is ready to form an elastic pad. Curing occurs in the patient’s oral cavity.

Similarly prepare the composition according to examples 2-6 (table 1)

The properties of the materials obtained are given in table. 2. As can be seen from the table. 2 data, the use of the proposed modifier in the composition (examples 1-6) can significantly increase the adhesion of the gasket with a hard basis in comparison with a composition prepared in the same way, but not containing a modifier (example 7).

Table 1
Song Properties Ingredients Conventional song numbers 1 2 3 4 5 6 7 1. Polydimethylvinyl siloxane with viscosity, cP 500 100 - - - - 150,000 - 100 - 100 - 300,000 - - 100 - 100 100 100 2. Modified Aerosil 16,2 10 thirteen - 22 - 22 3. Quartz sand - 15.8 - 25.8 - - - 4. Diatomaceous earth - - 7 - - 25.8 - 5. Silica 8 HO [Si (H) εtO] ₄ -4 1 - 2 - 1,5 - 1,5 HO [Si (H) MeO] ₄ -4 - 3 - 2 - 2 - 6. Platinum-1,3 divinyltetramethyldisiloxane 5 · 10 ^-2 5 · 10 ^-4 5 · 10 ^-2 5 · 10 ^-2 5 · 10 ^-3 5 · 10 ^-2 5 · 10 ^-3 7.3 - [(2-hydroxypropylmethacrylate) aminopropyl] -triethoxysilane 1 3 2 1,5 2 1 -

table 2
Properties of the resulting materials Indicators Conventional song numbers 1 2 3 4 5 6 7 1. Curing time, min 5 5 5 5 5 5 5 2. Conditional tensile strength, MPa 3.2 2,8 3.0 2,4 2.6 2,8 3.0 3. Shore hardness, A 32 thirty 28 thirty 22 28 thirty 4. The force of separation from the acrylic substrate, kg / cm 7.2 6.9 7.8 8.2 8.0 6.5 3.8

Claims (4)

1. The composition for forming a lining layer under the basis of a removable denture, including polydimethylmethylvinylsiloxane rubber, filler, silicon hydride and platinum catalyst, additionally contains 3 - [(2-hydroxypropyl methacrylate) aminopropyl] -triethoxysilane in the following ratio, wt.h: Polydimethylmethylvinylsiloxane rubber 100 Filler 16.2-25.8 Silica hydride 1.0-3.0 Platinum catalyst 5 · 10 ^-4 -5 · 10 ^-2 3 - [(2-hydroxypropyl methacrylate) aminopropyl] - triethoxysilane 1.0-3.0 2. The composition according to claim 1, characterized in that it contains a dye in an amount of 1 · 10 ^-4 -1.5 · 10 ^-5 wt.h. 3. A removable denture containing an acrylic base and a lining layer under the basis formed from a composition based on siloxane rubber, characterized in that the composition for forming the lining layer under the basis includes, by weight: Polydimethylmethylvinylsiloxane rubber 100 Filler 16.2-25.8 Silica hydride 1.0-3.0 Platinum catalyst 5 · 10 ^-4 -5 · 10 ^-2 3 - [(2-hydroxypropyl methacrylate) aminopropyl] - triethoxysilane 1.0-3.0 4. A removable denture according to claim 3, characterized in that the composition for forming the lining layer further comprises a dye in an amount of 1 · 10 ^-4 -1.5 · 10 ^-5 wt.h.