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The state of extensive deformation of tooth-parodont system has been explored considering the stage of the alveolar crest bone resorption and anatomical consequences of tooth depulpation. The research involving mathematical simulation in combination with the finite element analysis and Schleicher-Nadai theory has stated that removal of single-rooted teeth caused by periodontal diseases does not increase the maximum allowable level of occlusal load in case of good bone mineralization. Provided depulpation is inevitable, periodontal tissue should either not be substituted with fibrious tissue or replaced with one third intra alveolar length. Biomechanical features imply a varied choice of methods and tooth filling materials used for filling root canals as well as revision of parodontogram rates in terms of periodont changes after pulp removal.

In order to improve clinical examination quality of patients who use dental prostheses on implants, an expert evaluation of the protocol for dental diseases prevention «Guided Biofilm Therapy» was carried out. Based on it, a standard operating procedure «Oral hygiene of patients using prosthetic implants» has been developed. It’s clinical approbation led to the conclusion about safety and efficiency of prophylactic procedures with regard to biofilm elimination as the main etiological factor of mucositis and periimplantitis. To achieve high quality of the protocol manipulations, they must be carried out by qualified personnel, taking into account indications and contraindications, observing all features of working with the tissues surrounding implants.