Table 3.

Failure mode of different experimental groups expressed in percentage.

Material	Bonding Condition	Aging Condition
		Dry			Water			75% Ethanol/Water
		Adhesive failure	Cohesive failure	Mixed failure	Adhesive failure	Cohesive failure	Mixed failure	Adhesive failure	Cohesive failure	Mixed failure
Duralay	No Bond	100	0	0	100	0	0	–	–	–
	SUA	100	0	0	100	0	0	66.7	33.3	0
	TUP + SUA	66.7	33.3	0	33.3	66.7	0	100	0	0
CAD/CAM PMMA	NB	100	0	0	100	0	0	100	0	0
	SUA	66.7	33.3	0	100	0	0	100	0	0
	TUP + SUA	100	0	0	100	0	0	33.3	66.7	0
Protemp 4	NB	16.7	50	33.3	66.7	33.3	0	66.7	33.3	0
	SUA	0	100	0	0	100	0	0	100	0
	TUP + SUA	0	100	0	0	100	0	66.7	33.3	0
Luxatemp Star	NB	0	100	0	50	50	0	83.3	16.7	0
	SUA	0	100	0	0	100	0	0	100	0
	TUP + SUA	0	100	0	0	100	0	16.7	83.3	0

NB: No bonding agent.

SUA: 3M Single Bond Universal Adhesive.

TUP + SUA: Tokuyama universal primer followed by a 3M Single Bond Universal Adhesive.