FIELD: medicine.SUBSTANCE: invention refers to medicine, namely to surgical dentistry, and can be used in treating such pathological conditions as gingival recessions 2, 3 of Miller class related to thin structure of periodontium tissues (biotype) and small oral vestibule. Ruffled border incision is made at the recession value from the first molar of one side to the first molar of the opposite side from the tops of adjacent papillae. Mucous-mucoperiosteal flap split in the area of the interdental papillae and the attached gum and separated in the zone of recessions of the second and third Miller classes and below the level of attachment is peeled off, the depth of flak delamination is lower than the level of the apical part of the dental roots. Bone surface is cleaned from the periosteum fibers manually and by means of ceramic cutters. Bone scraper is sampled at a base of alveolar portion of the jaw and mixed with osteoplastic xenogenic material of inorganic and organic composition at a weight ratio of 1:1:0.5. Deepithelialize the remaining upper portion of the interdental papillae and the attached gum above the incision line. On a solid palate, a full-layer gingival graft in the form of strip 2 mm wider than the recessions is sampled, de-epithelised, flap is mobilized in the base within the teeth with recessions for free coronal displacement. Open part of the root in the recession zone is treated mechanically, smoothed and biomodified with EDTA gel and washed thoroughly. Prepared de-epithelial connective tissue graft is placed on the recession area, located 1 mm above and below the recession border in the form of one or more fragments, fixed to the gingival papillae. To the periosteum below the mobilization level, the collagen resorbable membrane is fixed with absorbable sutures, the obtained mixture is placed on the bone surface, filling the interdental impressions, and aligning the surface of the alveolar portion until the fenestrations and dehiscences are closed
