Effect of the surface dehydratation (Ethanol-Wet Bonding) on the microleakage scores of the two current self etch adhesive system

Objective: the purpose of this study was to investigate the effect of surface pretreatment with ethanol before bonding procedure, on the microleakage of two current self-etch adhesive systems. material-method: class v cavities were prepared on the facial surfaces of 28 non-carious, human third molar teeth at the cemento-enamel junction. a two-step self-etch adhesive clearfil se bond and a one-step self-etch adhesive clearfil s3 bond were applied to the cavities directly, according to the manufacturer’s instructions or after pre-treatment with 95% acetone for 30s before bonding (n=7). after bonding, the cavities were filled with a resin composite. the teeth with completed restorations were thermocycled 1,000 cycles between 5°c and 55°c. after thermocycle, the teeth were immersed in 0,5% methylene blue dye for 24 hours. the specimens that removed from dye were then sectioned longitudinally and dye penetration was scored. data were analyzed using kruskal- wallis and one-way anova tests. results: the microleakage scores of clearfil se bond and clearfil s3 bond, used directly or with ethanol pre-treatment to the cavity surfaces, were similar at enamel walls, the scores of clearfil se bond were slightly reduced on dentinal walls when compared with clearfil s3 bond (p>0,05). the pretreatment of ethanol before bonding system application to the cavity surfaces had no significant effect on the microleakage scores of two adhesive systems on enamel and dentin. discussion: the microleakage scores of self-etch adhesive systems on dentinal walls of the teeth were slightly reduced after ethanol pre-treatment, but the scores on enamel walls were not affected. the ethanol pre-treated dentin surfaces may provide an improved substrate for resin adhesion of selfetching adhesives due to the dentin dehydration in long terms.