Rare occurrence of c-shaped root canal configuration in mandibular first molar

Abstract

The occurrence of C-shaped root canal configuration in mandibular first molar is rare. The present case has an unusual C-shaped root canal configuration for both the appearances of the canal orifices and the configuration along the roots. Use of cone-beam computed tomography, rotary and hand instrumentation assisted with sonic and ultrasonic activation of irrigation solution is very important for effective management of this anomalous canal configuration. Modifications in the obturation techniques will ensure a three-dimensional fill of the canal system. Clinician should expect to encounter unusual features when performing endodontic treatment.