TY JOUR TI INFLUENCE OF MATERIALS OF ABUTMENTS OF IMPLANTS AND GINGIVAL FORMERS ON PERIIMPLANTATE SOFT TISSUES KW dental implantation KW abutment KW gingival formator KW periimplant tissues KW zirconium KW titanium KW polyetheretherketone KW biocompatibility JO Actual problems in dentistry AU Koshelev, k.A. AU Zobacheva, V.V. AU Baranov, I.P. AU Lavlinskaya, A.N. AU Zobachev, V.I. AU Zhuruk, T.V. PY 2026 IS 22 PB TIRAZH Publishing House