Fracture Resistance of CAD/CAM Lithium Disilicate of Endodontically Treated Mandibular Damaged Molars Based on Different Preparation Designs

Table 3

Fracture mode by group (Fisher’s exact test).

	Group
Type of fracture	SP0		SP1		CP0		CP1		Group	P value
	n	%	n	%	n	%	n	%	Total
1. Detachment of the endocrown without fracture	-	-	-	-	1	10.0	-	-	1	p (1) =0.170
2. Fracture without detachment of the endocrown and presence of a crack in the remaining tooth structure.	4	40.0	5	50.0	2	20.0	3	30.0	14
3. Fracture with partial detachment of the endocrown and presence of a crack in the remaining tooth structure.	1	10.0	-	-	5	50.0	2	20.0	8
4. Fracture with partial detachment of the endocrown and remaining tooth structure.	5	50.0	5	50.0	2	20.0	5	50.0	17
Total	10	100.0	10	100.0	10	100.0	10	100.0	40