Abstract
Introduction: The repair in the composite clinical procedure is handy and allows the removal of the damaged portion of the restoration without requiring complete replacement of the same, allowing the preservation of sound tooth structure. Objective: The objective of this study was to review the literature evaluating the use of silane in repairs of composite resin restorations and the procedures to be followed. Methods: The PRISMA Platform systematic review rules were followed. The search was carried out from January to March 2024 in the Scopus, PubMed, Science Direct, Scielo, and Google Scholar databases. The quality of the studies was based on the GRADE instrument and the risk of bias was analyzed according to the Cochrane instrument. Results and Conclusion: A total of 117 articles were found, 43 articles were evaluated in full and 36 were included and developed in the present systematic review study. Considering the Cochrane tool for risk of bias, the overall assessment resulted in 07 studies with a high risk of bias and 21 studies that did not meet GRADE and AMSTAR-2. Most studies did not show homogeneity in their results, with X2=74.5%>50%. In the literature review was noted that the preference for maintaining part of the restoration and repair of the clinical protocol should be thoroughly evaluated and implemented to increase the predictability of the procedure. The restorative material should unite, not only to tooth structure but also already present in the resin preparation. Thus, silanes and resins without charge are traditionally used as coupling agents in repairs. The advantages of this procedure compared with total replacement, and the possibility of obtaining a good integrity and longevity of the restoration involved were discussed. It was concluded that the adhesion between the existing and the new resin increment of resin can be enhanced by employing a silane, associated or not with an adhesive system.