Maxillary First Molar with One C-Shaped Fused Root Diagnosed with Cone-Beam Computed Tomography: A Case Report

Introduction:The root canal system of maxillary first molar is complicated. It is hard to master its variations. This case report showed a rare root canal configuration diagnosed with cone-beam computed tomography (CBCT). Methods :The dental operating microscope (DOM) and CBCT were used to search root canal orifices and confirm the rare root canal configuration. Results: CBCT images showed the maxillary first molar having 5 root canals in one C-shaped root with fusion of the mesiobuccal, distobuccal and palatal roots. Conclusions: The DOM and CBCT facilitated the diagnosis and treatment of a rare C-shaped fused root canal configuration in a maxillary first molar.