Abstract :
Root canal treatment of a mandibular molar with aberrant canal configuration can be diagnostically and technically challenging. To date, an anatomical variation that has received particular attention is the three-rooted mandibular molar. This case report addresses the clinical management of a broken K-file in a second mandibular molar with unusual anatomy (2 mesial roots). Exact location of the instrument and the hidden canal orifice were revealed, and the fragment removed using ultrasonic tips, under a dental operating microscope. This case report highlights the usefulness of cone beam computed tomography (CBCT) for a better diagnosis and management of an unusual root canal morphology
