TY JOUR TI ESTIMATION OF QUALITY PROCESSING OF ROOT CANALS AFTER RE-ENDODONTIC TREATMENT BY THE METALLOGRAPHIC EXAMINATION KW dentin KW microstructure JO Actual problems in dentistry AU Panfilov, P.E. AU Griroriev, S.S. AU Kurischev, A.A. PY 2013 IS 9 PB TIRAZH Publishing House