SU1017317A1 - Composition for casting tooth prosthesises - Google Patents

Description

ABOUT)

with

with

The invention relates to medicine, namely to dentistry, and can be used for the manufacture of solid dentures.

A known compound for casting dental prostheses, containing powdered quartz silica sand (1.

However, prosthetics obtained from a known composition, only partially, k% compensate for the shrinkage of the cobylto-chrome alloy and non-heat-resistant (withstand heating only up to 650 C).

The aim of the invention is to increase the compensation of the shrinkage and heat resistance of the mass.

The goal is achieved in that the composition for pouring dentures containing powdered quartz and quartz sand. additionally contains expanded clay, polyethoxysiloxane - magnesium oxide 1.5-2% acetone solution of triethanolamine with the following ratio of components, wt .:

Dust quartz 36,

Expanded clay5

Magnesium oxide 3,3-t, 1

37.0 9.3 3.3 5.9 7.5

35.2 7.9 3.7 7.9 8.3

1, acetone: tri solution;

ethanolamine 5.9-8.3 Polyethoxysiloxane-53 7.5-9.0 Quartz sand Else To obtain a refractory mass, three mixtures of ingredients are prepared, each containing, in wt.%: 11 11 111

36.0

37.0

37.0 5.6 9.3 7.9 1 3.3 3.7

8.3

5.9

7.9 8.3 7.5

9.0

37.0 35.2 37.0

Each mixture is poured into a form of gel. The resulting refractory models have the characteristics presented in the table.

7.0 Plot is plated, but has

insufficient fluidity and slowly poured into the mold. The resulting model has a smooth surface without defects. Compensation for the shrinking of the cobalt-chromium alloy (coefficient of thermal expansion) is 1.5-1.6%. Heat resistance mass of 7 0-750 ° e,

7.0 The mass is clad better, has good fluidity, and is easily poured into the mold. The resulting mo, del has a smooth, smooth surface. Compensation for the shrinkage of a kobapto-chrome alloy (coefficient of thermal expansion

Claims (1)

COMPOSITION FOR CASTING OF DENTAL PROSTHETES, containing pulverized silica, silica sand, characterized in that, in order to increase the compensation of shrinkage and heat resistance of the mass, it additionally contains expanded clay, polyethoxysiloxane - 53, magnesium oxide; 1.5’2% acetone solution of triethanolamine in the following ratio of components, wt.%: Dusty to £ Arts 36,0-37,0 Expanded clay 5.6-9.3 Magnesium Oxide 3.3-4.1. 1.5-2 acetone solution of triethanolamine 5.9-8.3 Polyethoxysiloxane-53 '7.5 “9> 0 Quartz sand Other>