TY JOUR TI SELECTION OF TACTICS OF MODERN RESTORATIVE SURGERY FOR CHRONIC PERIODONTAL DISEASES KW generalized periodontitis KW reparative osteogenesis KW FRP-guided tissue regeneration preparation KW surgical treatment KW Fibrine Riche en Plaquettes – FRP JO Actual problems in dentistry AU Musienko, A.I. AU Nesterova, K.I. AU Mikhailovsky, S.G. AU Musienko, I.S. AU Lipatova, A.V. AU Voitovic, V.E. PY 2026 IS 2021 PB TIRAZH Publishing House