Effect of coping materials zirconia or polyetheretherketone with different techniques of fabrication on vertical marginal gap and fracture resistance of posterior crowns with composite veneering

Table 4 The percentage of the failure mode in each group

Group	Catastrophic fracture	Fracture and separation of veneering
Zirconia	100%	0%
PEEK CAD	100%	0%
PEEK Press	0%	100%

ISSN: 1472-6831