The use of cone-beam computed tomography and digital periapical radiographs to diagnose root perforations.

Introduction: The aim of this study was to compare the sensitivity and specificity of cone-beam computed tomography (CBCT) scans and digital periapical radiographs (PR) in detecting strip and root perforations after root canal treatment in mandibular molars.

Methods: Forty-five curved mesial roots were endodontically prepared. Fifteen roots were perforated in the mesiolingual canal by inserting a rotary file through the canal curvature penetrating the root surface ("root perforation"), and 15 roots were perforated with a drill in the axial aspect of the canal ("strip perforation").