Periodontal diseases are one of the most important problems in dentistry, due to its very high dissemination. Inflammatory processes in periodontal tissues are more common among young people, which, in the future, without adequate treatment lead to irreversible changes in structure of cellular bone. This causes development of new effective therapeutic complexes aimed at eliminating etiopathogenetic factors development of periodontal tissues inflammatory diseases and the targeted influence on the pathological processes in these tissues. The objective of the study was to analyze the efficiency of suggested initial-I stage generalized periodontitis treatment among second-year students of medical university. Materials and methods. To achieve this goal, we examined and treated 50 students with initial-I stage of generalized periodontitis without somatic pathology, which were divided into two groups, depending on treatment method. First group included 25 students who received advanced treatment; second group included 25 students, who received usual treatment. Control group consisted of 20 clinically healthy students. The state of oral cavity prooxidant-antioxidant system was determined by the level of malone dialdehyde (MDA), diene conjugates (DK), superoxide dismutase (SOD) activity, glutathione-S-transferase (G-ST), and the activity of glutathione peroxidase (GPO). Results and discussion. Periodontal diseases, namely, initial-I stage of GP, are accompanied by an imbalance of oral cavity prooxidant-antioxidant system indicators. This is confirmed by an increase number of MDA and DK (p<0.001), and a decrease in SOD, G-ST, GPO (p<0.001) compared to clinically healthy students. Conclusions. The results of GP treatment in first group were significantly better in relation to the second one (p<0.05), indicating the effectiveness of the proposed advanced treatment of initial-I stage of GP.