Effect of Incisal Porcelain Veneering Thickness on the Fracture Resistance of CAD/CAM Zirconia All-Ceramic Anterior Crowns

Table 3

Comparison between modes of fracture of total specimens in each incisal veneering thickness.

Mode of fracture	Incisal veneering thickness				MCP
	1.5 mm		3.0 mm
	No.	%	No.	%
Crack in the crown (Mode I)	5	50.0	2	20.0	0.364
Veneer chipping (Mode II)	4	40.0	6	60.0
Bulk fracture (Mode III)	1	10.0	2	20.0

MCP: value based on Mont Carlo exact probability.