Fracture resistance of overtly flaring root canals filled with resin-based obturation material.

Background: Reinforcement of root canals obturated with Resilon was reported by several investigators, but no studies reported the reinforcement of overtly flared root canals obturated with Resilon material. The aim of this study was to investigate the fracture resistance of overtly flared root canals filled with Resilon as compared to similar root canals filled with gutta-percha (GP).

Materials And Methods: Sixty single-rooted premolars were divided randomly into six groups.