Effects of chronic administration of xenobiotics pro-oxidants on the state of periodontal tissues, level of free-radical oxidation of lipids, and antioxidant provision were studied. Diphenin and delagil were found to promote biochemical and morphological changes similar to the manifestations observed in periodontitis. A conclusion is made about an important role of nonenzymatic free-radical oxidation of lipids and biopolymers in the pathogenesis of periodontitis. The principal stages of contribution of autooxidation to the parodontogenesis are presented.
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