Table 2

Groups	Occlusal			Gingival			Paired Differences		Paired Samples Test
Groups	Mean	±	SD	Mean	±	SD	Mean	SD	t	P-value
Group I	0.300	±	0.571	0.800	±	0.894	-0.500	1.051	-2.127	0.047*
Group II	0.550	±	0.826	1.900	±	0.968	-1.350	1.040	-5.805	<0.001*
Group III	0.500	±	0.607	1.550	±	0.999	-1.050	1.234	-3.804	0.001*
Group IV	0.700	±	0.733	1.450	±	0.887	-0.750	1.251	-2.680	0.015*
(Gr I): Adper single Bond2 etch and rinse adhesive(Control group) (Gr II): Clearfil SE BondSelf etch, Water-based adhesive (Gr III): Clearfil S³Self etch, Ethanol-based adhesive (Gr IV): I-BondSelf etch, Acetone-based adhesive *Significant p values of paired samples test

Table 2: Mean of dye Penetration Scores and standard deviations for the tested materials at the occlusal and gingival walls.