THE RESULTS OF DETERMINING THE PH OF GINGIVAL FLUID IN PATIENTS WITH NON-REMOVABLE DENTURES MADE BY TRADITIONAL AND DIGITAL METHODS

Abstract

Relevance. Non-removable dentures have an effect on the marginal periodontal of the supporting teeth. An objective criterion for evaluating the periodontal reaction is the hydrogen index of the secreted gingival fluid as the physiological environment of the body, the transudate of blood serum filling the gingival sulcus. The aim of the study was to determine the effect of non–removable prostheses made by traditional and digital methods on the condition of periodontal tissues by measuring the pH of gingival fluid. Materials and methods. To determine the pH of the gingival fluid, special strips of universal indicator paper were used, which allow measuring the pH of the biological fluid in the range from 3.0 to 7.5 units with a minimum step of 0,3. Results. Digital and traditional methods of manufacturing non-removable prostheses are statistically significantly distinguishable with a significance level of p < 0,025 by the pH value of the secreted gingival fluid. Thus, the hydrogen index of gingival fluid in patients with prosthetics using traditional technologies was shifted to a more acidic environment (the median samples differ by 15,4%). Our study made it possible to establish that the hydrogen index of gingival fluid in supporting teeth covered with non-removable dentures made by the digital method is closer to the boundary values of the norm, which indicates their weakly pronounced effect on the condition of the marginal periodontium, due primarily to the smaller thickness of the edge of the artificial crown, which does not have a repelling effect on the gingival margin, unlike from traditional designs with a thicker edge, secondly, the anatomical shape of the prosthesis, which differs little from a natural tooth, and thirdly, significantly less influence of the microbial landscape with a more precise fit of the edge of the artificial crowns to the posterior ledge.