Occlusal Gingival
Group / score 0  1   2  3 01 2 3
Composite bonded with Adper single Bond2. n=20 (**ER two step adhesive) 15  4  1 0   9  7  3 1  
Composite bonded with Clearfil SE Bond (water-based) n=20 (*SE two step adhesive) 12  6   1  1    31  11 5  
Composite bonded with Clearfil S³ Bond (ethanol-based)   n=20 (*SE one step adhesive) 11 8 1 0 3 7  6  4
Composite bonded with I- Bond (aceton-based)  n=20 (*SE one step adhesive)   9  8 3 0 3  7 8  2      
Table 5: Dye Penetration Scores for the tested materials at occlusal and gingival walls.