TY JOUR TI ROMAN-FLUORESCENCE CHARACTERISTIC OF THE SURFACE OF DENTAL HARD TISSUES DEPENDING ON THE DURATION OF ORAL HYGIENE IN PATIENTS RECEIVING RADIATION THERAPY KW radiation caries KW mineralization of hard tissues KW Raman fluorescence KW dentistry KW radiation therapy KW oncology JO Actual problems in dentistry AU Belaykov, G.I. AU Nurieva, N.S. PY 2025 IS 20 PB TIRAZH Publishing House