Influence of different drying protocols on bond strength of epoxy resin- and calcium silicate- based root canal sealers in nonsurgical retreatment

Description

Yuzer and Ozasir ask an endodontic question: how dry should a root canal be before sealing it, especially when redoing a failed treatment? Moisture left in dentine can weaken the seal, and retreatment dentine behaves differently from virgin dentine. Their 2026 laboratory study prepared 192 extracted human premolars and dried canals four ways, from paper points to ethanol rinses. It sealed them with either an epoxy resin or a newer calcium silicate sealer, then measured how hard each seal resisted being pushed out.

Bond strength rose toward the root tip in nearly every group, and retreated teeth bonded far more strongly than first-time teeth at the tip, more than doubling the average push-out strength there. Ethanol drying won in several tip conditions, while the two sealers performed indistinguishably at every level. The authors say drying protocol and treatment history matter more than sealer brand here.

Catalog record

Source: https://europepmc.org/articles/PMC13505031