In this scientific work was performed the extended study of hypersensitive teeth on patients with chronic periodontitis in order to evaluate the frequency of this painful condition and the intensity of provoked pain, its dependency on individual′s age, sex, nutrition and oral hygiene habits, extent of tooth mobility and dental attachment loss, amount of the plaque on tooth surfaces, professional oral hygiene, surgical treatment of chronic periodontitis; to examine the structure of dental pulp and hard tissue of hypersensitive teeth, to assess the effectiveness and possibility of treatment using a new generation desensitizing materials. It was determined that the prevalence of teeth hypersensitivity and the pain intensity among the patients with chronic periodontitis is high and directly dependent on individual′s nutrition, oral hygiene habits, age, the extent of tooth mobility and dental attachment loss; professional oral hygiene and surgical treatment significantly increases the pain intensity of hypersensitive teeth; were not found any structural changes in the pulp, hard tissues and myelinated nerve fibres of hypersensitive teeth; new generation desensitizing materials ensure fast, effective and long-lasting reduction of pain intensity.