TY JOUR TI THE STUDY OF BIOCHEMICAL PARAMETERS OF BONE METABOLISM OF THE ORAL FLUID IN THE TREATMENT OF AGGRESSIVE PERIODONTITIS KW fast-progressing periodontitis KW calcium KW phosphorus KW alkaline phosphatase KW biochemical parameters of oral fluid KW Parodontax COMPLEX PROTECTION JO Actual problems in dentistry AU Uspenskaya, O.A. PY 2019 IS 15 PB TIRAZH Publishing House