ANALYSIS OF THE ADHESION OF MICROORGANISMS TO MODERN BASIC MATERIALS IN PROSTHETIC DENTISTRY

Aim. The research was conducted for the study of the adhesion of samples of the domestic modern photopolymerizable base composite material in comparison with other materials for the manufacture of the denture bases.

Materials and methods. Five samples of the materials were tested to conduct a microbiological study on the subject of primary adhesion of microorganisms to the surface of the base materials. The adhesion of microorganisms to the samples of the base composite materials was assessed using the index method.

Results. As a result of a laboratory research, it can be concluded that the new photopolymerization material «Sample 1» used for the manufacture of the bases for the removable dentures has 1, 19 times lower adhesive activity to the colonyforming Prevotella intermedia microorganisms and Candida krusei mushrooms in comparison with the acrylic plastics and thermoplastic materials «Sample 2»; 1,14 times in comparison with the nylon material «Sample 3» and with the monomer material «Sample 4» with a statistically reliable variable number. It should be noted that the Axil-LC topcoat varnish supplied with the Sample 1 basic material kit increases microbial adhesion by 1.36 times.

Conclusion. The adhesion of microorganisms to the materials that are used in dental practice is due to the surface tension coefficient – the greater the surface tension coefficient, the higher the probability of adhesion of microorganisms on the surface of these materials. The investigated new photopolymerization material «Sample 1» without coating with a protective varnish showed low adhesion to all major pathogens. Covering with a protective lacquer design, which is a part of the set of the material, significantly increases the adhesion of microorganisms on the surface of the material. The established indexes of microorganisms adhesion to the material «Sample 1» allow us to recommend it for the manufacture of bases for temporary dentures and immediate dentures in the treatment at the stages of dental implantation.