Keywords
decontamination
impressions
international standards
denture designs
How to Cite
Abstract
In press
Today, there are many methods of obtaining impressions of the prosthetic bed, which allows for high accuracy and dimensional stability of modern impression materials. The choice of material often depends on the doctor's preferences, ease of use, and economic aspects. However, with the development of technologies for the manufacture of fixed prostheses, the requirements for the quality of impressions have increased, because modern CAD/CAM (Computer-Aided Design/Computer-Aided Manufacturing) systems provide the manufacture of artificial crowns with an edge fit of up to 20 microns. To achieve such a result, it is important to obtain a high-quality impression that accurately conveys information about the dimensions of the prosthetic bed. Today, even minor errors in impressions can be of significant clinical importance. Objective. To conduct a comparative assessment of the physical and mechanical properties of the improved A-silicone impression material in comparison with foreign analogues. Together with the accredited laboratory of JSC (Joint-Stock Company) Stoma in Kharkiv, the formulation of the domestic A-silicone impression material was improved and its comparative evaluation with analogues accredited in Ukraine was carried out. For the study, 80 samples (40 – from high viscosity materials (type I) and 40 – from low viscosity materials (type III) were produced to determine physical and mechanical properties, such as spatial stability, consistency, hardness, fluidity, strength, and toughness, in accordance with ISO (International Organization for Standardization) 4823. The measurement results are presented in the format M±m, where M is the mean value, m is the standard error of the mean (SEM). Statistical processing was carried out using parametric tests (Student's t-test and one-factor analysis of variance ANOVA) with subsequent comparison of group pairs using the Tukey post-hoc test. The level of statistical significance was set at p≤0.05. The materials used included an advanced a-silicone impression material with decoration properties A-silicone impression material with decorative properties and other variants from Ukraine.
Keywords: physical and mechanical properties, decontamination, impressions, international standards, denture designs.
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