Comparative evaluation of reinforcing effect of three different intra-orifice barriers on pericervical dentin of endodontically treated teeth: An study.

Aims: The purpose of this study was to evaluate and compare the fracture resistance of endodontically treated teeth using three different intra-orifice barriers.

Settings And Design: This study was conducted at the department of conservative dentistry and endodontics, an study.

Subjects And Methods: Forty freshly extracted single-rooted mandibular bicuspids ( = 40) were decoronated to obtain a 14-mm standard root length and all the canals were enlarged with ProTaper up to size F3 and they were obturated with gutta-percha using AH Plus sealer and randomly divided into 4 groups ( = 10).