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

Table 5

Two-way analysis of variance (ANOVA) test of significance for comparing the mean fracture load by groups, incisal veneering thickness, and modes of fracture.

Source	F
Group	75.7	0.000
Thickness	14.6	0.003
Modes of fracture	1.2	0.344
Group  thickness	0.5	0.494
Group  fracture	0.2	0.634
Thickness  fracture	0.3	0.737