[Features and significance of adhesion of bacteria and fungi of the oral cavity as the initial stage of the formation of a microbial biofilm on dental polymer materials].

Objective: Characteristics of the adhesion of yeast fungi and oral bacteria of various types to samples of polymeric materials for fixed structures of dental prostheses, obtained using various technologies: adjective digital 3D printing and traditional methods.

Material And Methods: Conducted model experiments on the adhesion of bacterial (including the main periodontopic-pathogenic species - ) and fungal pathogens () to standard samples of polymer materials NextDent C & B Micro Filled Hybrid («NextDent», Netherlands), Detax Freeprint temp UV («Detax», Germany), obtained by digital additive 3D printing technology, and Luxatemp Automix Plus («DMG», Germany) and Acrytemp («Zhermack», Italy) - by the traditional method as a control. Removal of adhering microbes from the material was carried out using an ultrasound machine (exposure time 10 minutes, power 60 kHz).

Results: The dependence of the degree of microbial adhesion on the nature of the material and processing technology (3D printing, milling) was established. The materials of NextDent C & B Micro Filled Hybrid and Detax Freeprint temp UV showed high resistance to adhesion of clinical isolates of periodontal pathogenic bacteria and fungi.

Conclusion: The lowest adhesion values for periodontopathogenic species and C. albicans fungi were detected when using samples of materials obtained by 3D printing: NextDent C & B Micro Filled Hybrid and Detax Freeprint temp UV compared to Luxatemp Automix Plus and Acrytemp polymers.