FEATURES OF ADHESION MICROORGANISMS TO EXPERIMENTAL SAMPLES OF BASIC POLYMERS DEPENDING ON SURFACE TREATMENT WITH DIFFERENT POLISHING PASTES

Abstract

Introduction. The high need for orthopedic treatment with removable dentures, as before, is led by insufficient sanitation of the oral cavity and untimely referral of patients to the dentist. One of the main factors in the successful treatment of patients with partial tooth loss is selectivity in the choice of polymer base materials for removable dentures. It is important how resistant the selected material is to the biological environment of the oral cavity, since low resistance can lead to changes in the quantitative and qualitative composition of the microflora. In addition, it is necessary to adhere to the technology of manufacturing removable dentures, since the formation of roughness, pores in the denture, insufficient care of the denture promotes the penetration of oral microorganisms into the base of the denture, stimulating the formation of plaque on the surface of the denture, which contains carbohydrates, proteins, leukocytes. Despite the fact that numerous studies have been devoted to studying the impact of removable dentures on the biocenosis of the oral cavity, the issue of the impact of the final treatment of the denture base with polishing pastes on the ability of microbial adhesion to its surface remains incompletely understood. The aim of the study. Was to investigate the main surface parameters of acrylic and thermoplastic polymers using scanning microscopy and primary adhesion of microorganisms, taking into account the treatment of samples with different polishing pastes. Research materials and methods. The studied samples of basic polymers were treated with various polishing pastes. For the experiment of modeling the primary adhesion of microorganisms to material samples, strains of opportunistic microorganisms were used. Electron microscopic studies of materials were performed using a scanning electron microscope. Results. According to scanning microscopy data studied polymer materials, it was determined that smoother surfaces after polishing with Vertex™ThermoGloss paste obtained from thermoplastic Vertex™ ThermoSens material compared to Blue Shine paste, and acrylic ones Villacryl H Plus polymers revealed fewer surface defects than in polymer Ftorax. Thermoplastic and acrylic polymer samples for the manufacture of removable denture bases have different degrees of microbial adhesion, which depends on the choice of polishing paste. Conclusions. Polishing the surface of thermoplastic and acrylic polymers with Vertex™ThermoGloss paste significantly affects the reduction of primary adhesion of microorganisms, and a particularly pronounced decrease in adhesion is noted in Candida albicans fungi.