APPLICABILITY OF USING GYPSUM MIXTURE’S MODIFIERS IN THE MANUFACTURE OF REMOVABLE DENTURES ACCORDING TO THE RESULTS OF THE REOPARODONTOGRAPHIC STUDY

Abstract

One of the important sections of orthopedic dentistry is materials science. It is well known that the orthopedic treatment of patients with complete loss of teeth is a complex problem of creating functionally complete removable dentures, which largely depends on the quality characteristics of modeling and packaging materials and on the exact correspondence of the inner surface of its base to the macro- and microrelief of the mucous membrane of the tissues of the prosthetic area. The purpose of our study was to conduct a comparative analysis of indicators of the use of gypsum mixture modifiers for the manufacture of removable prostheses based on the results of a reoperiodontographic study. A total of 24 patients (11 men and 13 women), 12 in each group, were examined. The age of the patients of the first and second groups was in the range from 55 to 80 years. The examined patients were divided into two groups. Determination of the functional state of regional vessels of the periodontium was carried out by the method of reoperiodontography (RPG), using the rheograph LACC-OP according to the tetrapolar method. When interpreting rheoperiodontograms, the following index values were taken into account as the most informative: peripheral resistance index, elasticity index, vascular tone index, and rheographic index. Quantitatively, the rheographic index of group 1 (RIN) was 0.079±0.025 Ом, the elasticity index (EI) was 81.32±2.95 %, the peripheral resistance index (PRI) was 65.29±2.55%; and vascular tone indicator (VTI) – 10.23 ± 2.87 %. In patients of 2 groups in quantitative terms: RIN was 0.455±0.27 Om, EI-81.27±1.27 %, RPI-76.29±2.23 %, VTI-12.29±0.02 %. The obtained results are statistically significant (Р<0.05). Thus, in relation to their data before RPG treatment, the indexes changed as follows: RIN increased by 14.29%, EI increased by 13.28 %, RPI decreased by 8.23 %, VTU decreased by 7.89%. Which allows us to conclude about the normalization of the dynamics of blood circulation in the arterial and venous departments of the mucous membrane and the stabilization of vascular tone in this area. Rheoperiodontography data allow us to say that the use of packing groups of materials with the addition of a modifying additive based on a polythemilsiloxane emulsion increases the functional efficiency of removable orthopedic structures.