Method: After the approval of the Ethics and Informed Consent Committee, 70 non-carious cervical lesions were selected and randomly assigned to two groups. Control group: restored with a two-step etch-and-rinse adhesive (Adper Single Bond 2, 3M ESPE) following manufacturers instructions; experimental group: restored in the same way of control group, however was applied a 2% chlorhexidine digluconate solution (30s) after etching and prior the adhesive application. All lesions were restored with Filtek Supreme (3M ESPE) and cured with a light-curing unit operating at 600 mW/cm2. Clinical performance was recorded after 1 week, 2, 6, 12, 36 and 48 months in terms of retention, post-operative sensitivity, marginal discoloration, marginal integrity, and secondary caries incidence. Data were analyzed using Chi-Square tests at p<0.05.
Result: At 48 months evaluation control group has a success rate of 84% in comparison to 76% of experimental group, although this difference was not statistically significant. No other statistical differences were observed between groups for criteria post-operative sensitive, marginal discoloration, marginal integrity, and secondary caries incidence.
Conclusion: The application of 2% chlorhexidine digluconate after etching and prior adhesive do not increase the bonding effectiveness in non-carious cervical lesions after 48 months
Keywords: Adhesion, Clinical trials and Composites