Mandibular First Molar Having an Unusual Mesial Root Canal Morphology with Contradictory Cone-Beam Computed Tomography Findings: A Case Report

Introduction: The objective of this article is to highlight the importance of having a thorough knowledge about the root canal anatomy and the possibility of misleading findings in the cone-beam computed tomography (CBCT) images. Methods: This case report presents the endodontic management of a right mandibular first molar with 2 roots and 2 canals. A CBCT imaging was performed to ascertain this rare root canal anatomy. Results: The clinical and radiographic diagnosis of the existence of a single root canal within the mesial root of mandibular first Molar did not correlate with the CBCT findings. Conclusions: The confirmative diagnosis should be based on cognitive deduction of the clinical picture and intelligent interpretation of radiologic information. (J Endod 2010;36:1712-1716)