RESUMO
OBJECTIVES: To evaluate the clinical performance of universal adhesives with self-etch mode regarding their functional monomer and HEMA contents. METHODS: The study involved 27 patients (108 restorations) aged between 34 and 69 (mean age: 53.8). Each restoration contained one of four different universal adhesives applied in self-etch mode: G-Premio Bond (HEMA-free, MDP and 4-MET containing), Xeno Select (HEMA and MDP-free), Tetric-n-Bond Universal (HEMA and MDP-containing) and Clearfil Universal Bond Quick (HEMA, MDP and amide monomers containing). The restorations were evaluated according to the FDI criteria at baseline, 6, and 12 months. The data were statistically analyzed using Friedman's and Kruskal-Wallis tests for significance in each pair (p⟨0.05). RESULTS: After 12 months, one restoration was lost in each of the G-Premio Bond and Clearfil Bond Quick groups. The success rate was 96.3% for both adhesives and 100% for Xeno Select and Tetric-n-Bond adhesives. There was no statistically significant difference between the four dentin adhesive groups among all the evaluation periods regarding any evaluation criteria. However, four universal adhesives showed clinically acceptable marginal discoloration and marginal deterioration in a few restorations. CONCLUSION: Monomer contents of universal adhesives with self-etch mode had no significant effect on the success of restorations.