REPAIR STRENGTH OF HEAT-PRESSED CERAMICS

The bond strengths of porcelain bonded to porcelain specimens using tw o different filled resin-based cements were compared by means of notch ed-disc test specimens. As a control group, unrepaired porcelain test specimens were fractured. Additionally, one group of broken half-repai rs was achieved by applying a bonding agent only. The control test spe cimens had significantly higher fracture strengths (P < 0.05) than the specimens bonded with either bonding agent or resin-based cements. No difference between the resin-based cements was found (P > 0.05).