Table 2.

Number of specimens (%) distributed according to the failure pattern for each experimental condition (*).

Adhesive systems	Groups	Pattern failure (%)
		Adhesive	Mixed	Cohesive		PTF
				Resin	Dentin
Adper	1	14 (56.0)	5 (20.0)	0 (0)	0 (0)	6 (24.0)
Single	2	22 (91.7)	2 (8.3)	0 (0)	0 (0)	0 (0)
Bond	3	15 (50.0)	15 (50.0)	0 (0)	0 (0)	0 (0)
XP Bond	1	18 (69.2)	0 (0)	0 (0)	0 (0)	8 (30.8)
	2	26 (92.9)	0 (0)	0 (0)	0 (0)	2 (7.1)
	3	22 (73.3)	8 (26.7)	0 (0)	0 (0)	0 (0)