Revisión sistemática : adhesivos universales en restauraciones directas.

Abstract

Introduction: To evaluate the adhesive force, it’s necessary that the following parameters must be evaluated: Bond strength, micro-tension resistance, shear or shear resistance. Purpose: The objective of the study is to evaluate the efficacy of universal adhesives in relation to direct composite restorations in enamel and dentin. Materials and methods: The bibliographic search was carried out in PubMed, Scielo and Scopus, they selected the articles that evaluated the resistance of microtension and resistance to shear, in the universal adhesives in comparison with the adhesives of the seventh, sixth and fourth generation in enamel and dentine. Results: In the microtension resistance, 163 studies were compiled, of which 73.62% in dentin and 26.38% in enamel. The studies based on enamel and dentin were classified by the generation to which they belong and the resistance to shear, it was possible to compile 104 studies, of which 61.54% on dentin and 38.46% on enamel, the studies based on enamel and dentin were also classified by generation. Discussion: Of the adhesives tested in the different studies for microtension resistance, a greater efficacy was presented for the universals compared to the other generations. Shear strength was significantly lower for universal adhesives compared to the sixth generation. Conclusion: For the microtension resistance, the universal adhesive presented greater efficacy in both enamel and dentin compared to the other generations. For the resistance to shear, the universal adhesive presented greater efficacy compared to the seventh and fourth generation, the sixth generation presented greater efficacy than the universal adhesives.