From: 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
Fracture resistance (N) (Mean ± SD)
f value
p value
Zirconia
PEEK CAD
PEEK Press
1687.47 ± 253.29A
2156.82 ± 407.64A
2436.72 ± 725.93A
3.41
0.06