Effect of core thickness differences on post-fatigue indentation fracture resistance of veneered zirconia crowns.

Purpose: Despite the excellent esthetics of veneered zirconia crowns, the incidence of chipping and fracture of veneer porcelain on zirconia crowns has been recognized to be higher than in metal ceramic crowns. The objective of this investigation was to study the effect of selected variations in core thickness on the post-fatigue fracture resistance of veneer porcelain on zirconia crowns.

Materials And Methods: Zirconia crowns for veneering were prepared with three thickness designs of (a) uniform 0.