Table 2.

Frequency (%) of sticks with premature failure according to the different strategies, dentin pretreatments, and time points

Strategy	Pretreatment	Time point
		24 h	6 months
Etch-and-rinse	CON	0/40 (0.0%)	1/40 (2.5%)
	DMSO	1/40 (2.5%)	1/40 (2.5%)
	DMSO/ water	0/40 (0.0%)	3/40 (7.5%)
	DMSO/ ethanol	0/40 (0.0%)	2/40 (5.0%)
p-value		1.0000	0.8372
Self-etch	CON	4/25 (16.0%)	4/18 (22.2%)
	DMSO	4/23 (17.4%)	5/18 (27.8%)
	DMSO/ water	5/23 (21.7%)	4/23 (17.4%)
	DMSO/ ethanol	5/27 (18.5%)	4/20 (20.0%)
p-value		0.9837	0.8731