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The aim of the study was to assess alveolar bone resorption in patients with periodontal disease and individuals with normal periodontal status and coordinate resorbtion rates with tooth mobility. Tooth mobility was measured in 19 patients with periodontal disease and 17 healthy individuals by two-parametrical periodontometry in two different positions: in equilibrium and after pre-loading. The level of bone resorption was determined by periodontal probe. Previously unknown correlation between tooth mobility and alveolar bone resorption was found out meaning that bone atrophy can be determined by tooth mobility.

The aim of the study was the evaluation of the effectiveness of using partial dentures made of thermoplastic materials for patients with generalized periodontitis of I-II degree of severity based on the results of clinical research. The effect of partial dentures made of acrylic, metal and thermoplastic materials with and without splinting elements of fixation on the state of periodontal tissues in patients with generalized periodontitis was studied. The results of clinical studies of patients periodontal tissues condition ,who have had dental defects on the background I-II severity of GP using partial splinting elements of fixation showed a significant improvement in oral hygiene, positive change in activity indicators current of generalized periodontitis. The group of patients for whom were made orthopedic constructions of thermoplastic masses, noticed reducing of the depth of periodontal pockets, tooth mobility, bleeding and inflammation of the interdental papillae and the gingival margin.

A method for the assessment of the reserve force of the periodontium is described, based on the estimation of the tooth root square size, degree of well atrophy, and tooth mobility. Periodontal strength coefficient was derived and a table, based on this coefficient, plotted. This coefficient and the table were used to assess the periodontal status of the remaining teeth when planning orthodontic treatment and to predict the immediate and late results of treatment.