TY JOUR TI EFFECT OF DIFFERENT ONLAY SYSTEMS ON FRACTURE RESISTANCE AND FAILURE PATTERN OF ENDODONTICALLY TREATED MANDIBULAR MOLARS RESTORED WITH AND WITHOUT GLASS FIBER POSTS KW onlay systems KW onlay restorations KW fracture resistance KW glass fiber posts KW endodontic treatment KW cementation KW fracture resistance test KW ferrule effect JO Actual problems in dentistry AU Ferrari, M.. AU Salameh, Z.. AU Ounsi, H.. AU Aboushelib, M.. AU Al-Hamdan, R.. AU Sadig, W.. PY 2015 IS 11 PB TIRAZH Publishing House