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The aim of this study was to evaluate the marginal integrity of a solvent-free one-step self-etch adhesive (Bond 1SF) and to compare it with ethanol-water based adhesive (Single Bond Universal (SB)) and acetone-water based adhesive (G-aenial Bond (GB)), at different storage times. Class V cavities (2×3.5×2.5 mm) were prepared on the buccal aspects of 90 human molars. The adhesives were applied to the cavities then the specimens were restored with A2 shade of Z250XT composite resin. Each group was evaluated for dye penetration under a stereomicroscope at X32 after one day, one month, and six months. Statistical analyses were carried out. In addition, in each experimental group, one specimen were prepared for analysis under SEM. Results: There were a significant differences in microleakage between the three adhesives at one day, Bond 1SF (B1SF) was the highest one. Whereas, there were no significant differences at six months. There were a significant differences in microleakage between the occlusal and gingival margin microleakage. Gingival margin microleakage was higher than that of occlusal margin. Conclusion: Storage time has adverse effect on the marginal integrity of solvent containing one-step self-etch adhesive while has no adverse effect on one-step solvent-free self-etch adhesive, microleakage increase obviously at the gingival margin, the type of solvent has a positive effect on the marginal integrity, ethanol-water based one step self-etch adhesives showed superior marginal integrity

Effect of solvent of one-step self-etch adhesives on the marginal integrity of resin composite to enamel and dentin