Comparative Evaluation of Marginal Adaptation and Fracture Strength of Different Ceramic Inlays Produced by CEREC Omnicam and Heat-Pressed Technique

Table 4

Fracture modes of restored specimens according to Burke [17].

Mode of failure	EC	LU	EL	EP
	IPS e.max CAD	Lava Ultimate	IPS Empress CAD	IPS Empress Esthetic
	CEREC Omnicam	CEREC Omnicam	CEREC Omnicam	CEREC Omnicam
I	6 (40.0%)	2 (13.3%)	5 (33.3%)	5 (33.3%)
II	4 (26.7%)	6 (40.0%)	5 (33.3%)	5 (33.3%)
III	- (0%)	3 (20%)	2 (13.3%)	1 (6.7%)
IV	5 (33.3%)	4 (26.7%)	3 (20%)	4 (26.7%)

Mode I: isolated fracture of the restoration; mode II: restoration fracture involving a small tooth portion; mode III: fracture involving more than half of the tooth, without periodontal involvement; mode IV: fracture with periodontal involvement.