Sixty teeth (n = 20 for each group) will be randomized into 03 groups: Clearfil SE (contains MDP and HEMA), Optibond All-inOne (contains HEMA) and Prime and Bond Universal (contains neither monomer) dispatch). Restorations will be performed by a single operator, and no mechanical retention will be performed under the cavity. After 6, 12 and 24 months, the restorations will be evaluated by two calibrated examiners, using modified USPHS criteria for retention (kappa = 1.00) and adaptation / marginal color (kappa = 0.81), and the results will be analysed by Fisher and Kruskal-Wallis, respectively. An intragroup analysis will be performed using the Cochran test (for retention) and Wilcoxon (for marginal adaptation / staining).
The objective of this randomized, double-blind clinical trial is to evaluate the clinical performance of non-carious cervicals adhesive restorations using three self-etching adhesives containing HEMA and 10-MDP monomers.