A comprehensive knowledge and understanding of root canal anatomical variations are essential for success- ful root canal treatment. Mandibular molar teeth show considerable variations in their external and internal radicular morphology that require special attention from dental practitioners to provide the best clinical out- comes to the patients. This report aims to present root canal treatment of a mandibular first molar that has six separate root canals (three root canals in the mesial roots and three in the distal roots [236 M3 D3]). This report points out the importance of proper exploration for identifying additional canals in mandibular molars.
Keywords: Canal anatomy, case reports, cone beam computed tomography, mandibular molar, middle mesial canal, middle distal canal.