TY JOUR TI CLINICAL STUDIES OF THE STABILITY AND PROCESS OF OSTEOINTEGRATION OF DENTAL IMPLANTS DURING IMMEDIATE AND DELAYED IMPLANTATION KW frequency resonance analysis KW damping KW stability KW osseointegration KW fixation KW implants KW periotestometry KW immediate implantation KW dentistry KW clinical study JO Actual problems in dentistry AU Grishin, P.O. AU Kalinnikova, E.A. PY 2021 IS 16 PB TIRAZH Publishing House