TY JOUR TI EXPERIMENTAL LOW ENERGY NANOSECOND LASEROTHERAPY AND MICROSURGERY OF MODELING PERIODONTITIS USING MORPHOLOGICAL ANALYSIS KW laser radiation KW semiconductor laser KW photodynamic effect KW periodontitis KW periodontal tissue regeneration JO Actual problems in dentistry AU Chunihin, A.A. AU Bazikyan, E.A. PY 2019 IS 15 PB TIRAZH Publishing House