TY JOUR TI THE ESTIMATION OF THE RESULTS OF SOCIAL AND HYGIENIC EXAMINATION OF THE RURAL POPULATION OF THE SOUTH OF TYUMEN REGION KW social and hygienic skills KW rural population KW south of Tyumen region KW medical and sociological questionnaire KW individual oral hygiene KW prevention of dental diseases JO Actual problems in dentistry AU Lebedev, S.N. AU Bragin, A.V. AU Safonova, A.V. PY 2021 IS 16 PB TIRAZH Publishing House