L.N. KHAFIZOVA1, S.S. KSEMBAEV1, O.V. NESTEROV2, E.V. MAMAEVA1 1Kazan State Medical University, 49 Butlerova St., Kazan, Russian Federation 420011 2Kazan State Medical Academy, 11 Mushtari St., Kazan, Russian Federation 420011 Khafizova L.N. — Competitor of the Department of pediatric dentistry in Kazan State Medical University, tel. +7-937-613-86-48, e-mail: l.hafizova@mail.ru1 Ksembaev S.S. — D. med. Sc., professor of the Department of pediatric dentistry in Kazan State […]