Effect of Endodontic Sealers on the Bond Strength of Glass Fibre Posts: A Systematic Review

This systematic review evaluated the influence of resin-based, eugenol-based and bioceramic endodontic sealers on the bond strength of glass fibre posts cemented with resin cements. Searches were conducted in PubMed, Scopus, Web of Science, Cochrane Library, Google Scholar and Embase, including in vitro studies using human or bovine teeth restored with fibre posts. Risk of bias was assessed using the QUIN Tool. Thirty three studies met the eligibility criteria. Most evidence indicates that resin-based sealers promote higher bond strength values than eugenol-based sealers, whereas findings for bioceramic sealers were inconsistent. Only a minority of studies showed a low risk of bias, while most presented moderate methodological limitations. Substantial heterogeneity was also observed, including differences in irrigation protocols, sealer types, adhesive strategies and post-cementation intervals. Within the limitations of the available evidence, resin-based sealers appear to be the most favourable choice for clinical fibre post cementation. PROSPERO Registration Number: CRD42023467018.