O uso de resina composta bulk-fill realmente diminui o tempo clínico em restaurações de dentes posteriores?

Abstract

This study aimed to systematically review the literature to compare the time required for filling cavities (restorative clinical time) in posterior teeth using a bulk-fill and conventional (layering technique) resin composite. A search for clinical trials and in vitro studies was performed in PubMed/MEDLINE, Scopus, LILACS, BBO, Cochrane Library, Clinical Trials and ReBEC databases. No publication year or language restriction was considered. From 623 potentially eligible studies, 125 were selected for full-text analysis, 4 were included in the systematic review and 3 in the meta-analysis. Two authors independently selected the studies, extracted the data and assessed the risk of bias. Mean difference was calculated for the clinical time means from bulk-fill resin composite and conventional resin composite. Statistical analysis was performed using RevMan5.3, with random effects model, at a significance level of p 0.05. Overall, the restorative clinical time was lower when bulk-fill resin composites were used (p=0.01) than conventional resins, solely when full-body bulkfill resin composites were evaluated (p<0.01). There was no difference between flowable bulk-fill resins and conventional ones (p=0.08). Moderate to substantial heterogeneity were detected. The use a full-body bulk-fill resin composites require shorter time to perform restorations in posterior teeth than conventional resins placed incrementally. There is not enough evidence to draw the same conclusion regarding flowable bulk-fill resin composites.