TY JOUR TI EVALUATION OF THE STAINING RESISTANCE OF COMPOSITE CAD/CAM BLOCKS: COMPARISON OF RUSSIAN MATERIAL WITH FOREIGN ANALOGUES KW CAD/CAM; staining resistance; color stability; ΔE*; laboratory study; esthetic properties; prosthodontic restorations JO Actual problems in dentistry AU Vafin, S.M. AU Vahobov, A.S. PY 2026 IS 22 PB TIRAZH Publishing House