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Background: The issue of clinical importance in the development of periimplantitis in the presence of microscopic particles and contaminants on the surface of implants is to be studied. Objective: based on the study of the microstructure and the qualitative and quantitative elemental composition, the cleaning effectiveness for different types of surfaces of implants obtained from patients with periimplantitis was researched. Methods: surfaces of 12 implants were investigated: TiU-nite (Nobel BioSare, Sweden), SLA (XiVE, Dentsply Implants, Germany) and RBM (BioHorizons, USA), which were processed in three ways: with Er laser; Cr; YSGG (Waterlase MD, Biolase, USA), diamond burr, (Comet, Germany); brush (Neobiotech, Korea). Results: regardless of the type of surface, the gentlest cleaning method was laser: when the macrostructure was broken, the microroughness remained, and the composition of elements did not contain extraneous inclusions. Diamond burr was the most traumatic: macro and microstructure breakdowns, the presence of grooves and notches, the introduction of diamond particles into the implant structure have been detected; carbon has dominated in the elemental spectrum. The use of the brush also led to disturbances in the macroand microstructure of the surface; nickel (Ni) was detected in the microelement spectrum. Conclusion: practical implication: the results of this pilot study are the basis for further more detailed research.

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