Fracture resistance of prefabricated versus custom-made zirconia crowns after thermo-mechanical aging: an in-vitro study

Table 3 Intergroup comparison of failure mode

Failure mode		Prefabricated crown	Custom made crown	χ²	p-value
I	n	1	0	12.80	0.012*
I	%	12.5%	0.0%
II	n	0	4*
II	%	0.0%	50.0%
III	n	4	1
III	%	50.0%	12.5%
IV	n	3	0
IV	%	37.5%	0.0%
V	n	0	3
V	%	0.0%	37.5%

ISSN: 1472-6831