TY JOUR TI A STUDY OF THE STRENGTH OF RUSSIAN AND FOREIGN COMPOSITE BLOCKS FOR THE PRODUCTION OF CROWNS USING THE CHAIRSIDE CAD/CAM TECHNIQUE KW composite material KW strength KW diametral tensile strength KW GOST KW dentistry KW crown KW prosthetic constructions KW clinical application JO Actual problems in dentistry AU Vahobov, A.S. AU Vafin, S.M. AU Deev, M.S. PY 2026 IS 22 PB TIRAZH Publishing House