Avaliação clínica de 12 meses de um sistema adesivo universal contendo cobre em restaurações de lesões cervicais não-cariosas: ensaio clínico randomizado triplo cego

Abstract

Copper particles have been incorporated in resinous materials with the aim of conferring antimicrobial effect and increasing the longevity of the adhesive interface. This study evaluated the effect of a universal adhesive system containing copper nanoparticles at 0,1% using etch-and-rinse (ER) and self-etch (SE) strategies for restorations of non-carious cervical lesions (LCNC). Thirty-six patients participated in this study. Two hundred and sixteen restorations were divided into 4 groups (n = 54): 1) Etch-and-rinse strategy with 0.1% copper (ER-CP); 2: Etch-and-rinse strategy without copper (ER-CT); 3: Self-etching strategy with 0.1% copper (SE-CP); 4: Self-etching strategy without copper (SE-CT). The nanohybrid composite resin was inserted in 3 increments. The evaluations were carried out according to the FDI and USPHS criteria at baseline (immediately, soon after restorative procedure), 6 and 12 months. The data were submitted to statistical analysis. The differences in the criteria evaluated between the 4 groups after each time (baseline vs. 6 months, baseline o vs. 12 months and 6 months vs 12 months) were submitted to the Friedman test (α = 0.05) and the performance of the different groups at each time was evaluated by the Wilcoxon test (α = 0.05). After 12 months, retention of the universal adhesive with addition of copper nanoparticles was similar when compared with the copper-free adhesive both in the etch-and-rinse and self-etching modes. According to the FDI criterion, all groups presented small discrepancies in the marginal adaptation, and the etch-and-rinse group had better results than the self-indulgent group.