Microleakage of endodontic access cavities restored with composites.

A proper seal of restorative composites in endodontic access cavities is mandatory to prevent ingress of microorganisms and debris into the tooth-restoration interface. Chemically cured composites tend to have less polymerization shrinkage than photopolymerization composites. This study compared in vitro sealing performance of a chemically cured and a photopolymerization composite for access cavity restorations in endodontically treated teeth.