SU624624A1 - Tooth prosthesis coating - Google Patents

Description

This invention relates to the field of medicine, namely orthopedic dentistry.

A coating for dental prostheses based on potassium aluminosilicates and sodium II is known.

However, the known coating does not provide high strength prostheses,

The aim of the invention is to increase the strength of the prostheses.

This is achieved by the fact that the coating is made in two layers, and the inner layer additionally contains 6 "O, ColO, MgrO, ZnO, F in the following ratio of components, wt.%:

63.89-68.71 14.7 -16.5 7.4 - 9.34 1.97 - 2.27 0.03 - 0.05 0.9 - 2.02 0.1 - OD2 4.0 - 6 , 0 0.75-1.25,

and the outer layer additionally contains

Fe, jO, CaO, Mg-o.BgOj, F, 2 at

the following ratio of components

weight, %:

57.8-60.0

SlOi

Ae, oh, 14.9-17.06

KgO 11.02-12.62 NQoO 3.35-5.15

Fe.jO, 0.03-0.05

CaO 2.0 -3.3

Mg-O O, O9-O, 11

 4.16-6.36, 85-1,15

In order to achieve the desired cosmetic effect, the coating is applied in two layers, the inner layer must have a small thickness and high adhesion strength with the alloy, the outer layer must ensure transparency of the cutting edge of the prosthesis.

When a first layer of coating is introduced onto the alloy, good wettability of the metal surface of the prosthesis, high adhesion strength to the alloy and opacity as a result of vacuum calcination of 1050 ° C reach. The coefficient of thermal expansion (CTE) of the material for the first layer of the coating is 12.0-12.5. x In order to obtain a self-hindering second slurry 01, a glue with a lower sintering temperature than that of the first layer, the following additives are introduced in order to ensure transparency of the cutting edge of the prosthesis in the mixture on the basis of potassium aluminosilicates and sodium. %: KNOj 4.0-6.0 CaF 3.5-5.5 Noi2B O76.0-8.0 The CTE of the material for the second layer is 11.5-11.9 x 10 1 / C. rioKpbiTite d. w / b i them ,. J .; r about ech a s. . KTP 12.5–12.8 Strength of the math-pokeramp construction of the zyggo prosthesis ds is combined with a combination of CT, megalic ocifOBb prosthesis on the alloy and kx; the next layers of the coating composition. The tsnnok oxide, which is part of the first layer of the hidden, provides no properties.

Flexural strength, kg / cm Impact strength, kgm

Kozffinpent, those; rmic races of the circus grad in the interval.

2 0-200 ° С X, hail

Toxicological testing of dental prostheses on animals has shown that the composition does not show in the body in animals with harmful substances.

Clinical trials were performed on 23 metal-ceramic dentures with the proposed coating applied to bridges and crowns of high-alloyed alloy. The term of observation is six months.

There were no complaints from the bans.

Changes in the gums and oral cavity was not observed. The color of the prostheses in the observed patients does not change and satisfies with the different aesthetic requirements. Damage to prostheses in the form of clefts and cracks was not observed.

The coating for aubic prostheses has a high strength of adhesion to the alloy; high strength nz bending, high | Oops, tew against act

1020-1GOO

980-1000

1.8-1.9 1.65-1.78

12.50-12.60 11.90-11.99

environment of the oral cavity, has increased impact strength.

Claims (1)

Invention Formula The coating for dental prostheses based on potassium aluminosilicates on the basis of, and, in order to increase the strength of the protees, it is made two-layer, and the inner layer additionally contains C CaO, MgO, Zh O, F in the following ratio of components, weight. %: SfOg 63.89-68.71 14.7 -16.5 K / 0 7.4 -9.34 1.97 -2.27 N "2 O 0.03-0.05 Sa 0.9 -2.02 Artg-o 0.1 - 0.12 transparency of the first coating layer, since as a result of firing, a ZnO, SiO compound is formed, having a refractive index of 1.69, 715. By introducing potassium nitrate and fluorspar, a high adhesion strength of the first coating layer with the alloy is achieved, since the adhesion is improved and the thermal expansion of the coating and the alloy is achieved. The introduction of the second layer to the coating of fluorspar, potassium nitrate and borax makes the material self-creeping, reduces the sintering temperature of the second layer compared to the first, ensures the transparency of the cutting edge of the process due to the formation of borosilicate glass. The composition for coating dentures is calcined in vacuum (10 mm Hg) at a temperature of 930-1050 ° C. The desired color is given to the coating by injecting small amounts of pipmentoB. The properties of the proposed coating are shown in the table. The second layer is the first layer 5 6246 ZhO 4.0 -6.0. 2 0.75-1.25, a outer layer additionally with a .Cab .Mg-o. BgO, p at the next ratio of components, weight. %: SO 57.8-60.05 14.9-17.06 11.02-12.62 Na.O 3.35-5.15 46 Fe-0, 0.03-0.05 2.0 -3, 3 MoO O.O9-O, B, GoS 4.1. . p, 0.85-1.15 Sources of information accepted during the examination: 1. US patent No. 3413723, cl 32-8, 1968.