SU1449127A1 - Composition for modelling parts for clasp dentures - Google Patents

Abstract

To increase plasticity, the composition contains, in wt%: beeswax 42-42.5; ceresin 25-32.5; carnauba wax 3-3.5; natural rubber 2-3; dye 0.04-0.06; paraffin rest. The composition is prepared by mixing the components with heat. Table I

Description

four "

WITH

1C

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

The aim of the invention is to improve the quality of prostheses by increasing the plasticity of the composition.

The proposed composition contains components in the following ratio.

42.0-42.5

25.0-32.5

3.0-3.5

0.04-0.06

2.0-3.0

Rest

wt.%:

Beeswax

Ceresin

Carnauba wax

Dye

Natural rubber

Paraffin

The introduction of ceresin provides the plasticity and viscosity of the composition, reduces its brittleness at room temperature, replaces partially wax of animal origin - bee, thereby ensuring the greater stability of the property. The introduction of natural rubber contributes to an increase in adhesion and flexibility of the composition at room temperature, simultaneously reducing the tendency to plastic deformation. Despite the low percentage of rubber in the composition and its low adhesiveness, the ratio of the components ensures good adhesion of the finished parts to the refractory model.

The results of the study showed that the amount of natural rubber, less than 2%, does not provide sufficient adhesion and flexibility of parts, especially these indicators deteriorate after storage of finished parts. Increasing the amount of natural rubber by more than 3% does not allow to get parts with a clear edge; when cleaning them with a scalpel, a fringe is formed; the composition sticks to the scalpel because of its increased adhesiveness.

The amount of paraffin due to the following: more than 27% paraffin in the composition increases its fragility at room temperature, the tendency to the formation of shells when pouring parts. Reducing the amount of paraffin leads to a decrease in the plastic deformation of the composition at room temperature, and this lowers the resistance of parts to deformation under

0

five

0

five

0

0

five

finger pressure technique when modeling.

The content of carnauba wax 3-3.5% provides the necessary hardness to the composition, an increase in it leads to a decrease in flexibility.

Beeswax is the base.

Increasing the amount of ceresin by more than 33% leads to the fact that parts from the composition are poorly treated with a scalpel, and a decrease below 25% leads to the need to increase the percentage of beeswax so as not to deteriorate the quality of the composition as a whole, which is not economically feasible.

The composition is prepared as follows.

The melting apparatus of any design for the preparation of wax compositions is loaded with crushed rubber and paraffin. It is heated at a temperature of 130-140 ° C, periodically stirring until a homogeneous mass is formed. Ceresin, carnauba wax and bee are added. The mixture is kept at a temperature of 115-125 ° C, periodically stirring until the components are completely melted and a homogeneous mass is formed, and a dye is added.

The finished wax composition is poured into molds and, after solidification, is removed from the mold and packaged in boxes or convalue. The table shows examples of formulations.

Claims (1)

Invention Formula A composition for modeling parts in the manufacture of clasp dentures containing beeswax, ceresin, carnauba wax, paraffin, a dye, characterized in that, in order to improve the quality of the dentures by increasing the plasticity of the composition, it additionally contains natural rubber at the following ratios. Mponentov, wt.%: Ceresin Beeswax Carnauba wax Dye Natural Couch Paraffin Beeswax Paraffin Carnauba Wax Ceresin Dye Natural Rubber 20,005 3.5 0.045 32.45 2 42 20 3 0.05 31.95 3 42.5 26.94 3 0.06 25 2.5