Shear Bond Strengths between Three Different Yttria-Stabilized Zirconia Dental Materials and Veneering Ceramic and Their Susceptibility to Autoclave Induced Low-Temperature Degradation

Table 6

Type of bond failures after debonding of the samples among all the three groups as examined under stereomicroscope.

Groups	Subgroups; Control = without artificial aging; Test = with artificial aging	Number of samples showing cohesive failure	Number of samples showing combined failure
Upcera	Control ()	9 (90% cohesive)	1 (10% combined)
	Test ()	14 (70% cohesive)	6 (30% combined)
Ziecon	Control ()	8 (80% cohesive)	2 (20% combined)
	Test ()	15 (75% cohesive)	5 (25% combined)
Cercon	Control ()	8 (80% cohesive)	2 (20% combined)
	Test ()	14 (70% cohesive)	6 (30% combined)