Defects in the perigingival region is a commonest pathology of hard tooth tissues that exerts the unfavourable action on the health state of marginal parodontium. The subgingival cavities serve as reservoirs of microorganisms pathogenic for parodontium. The chronic inflammatory process in marginal parodontium developing in response to microbial invasion may be a cause of local periodontitis (periodontal pocket/gum recession). The treatment of perigingival defects must include elimination of the main etiological factors of the disease, such as occlusal supracontacts, cessation of pernicious habits, and normalization of hygienic conditions of the oral cavity. Substitution therapy consists of filling the defect. Composite materials are supposed to be the best choice for this purpose due to their physicochemical and mechanical properties. Optimal filling conditions my be achieved by application of hemostatic and gingival retraction pastes.