Mandibular First Molar with Three Roots and Five Canals: A Case Report.

Clinicians may encounter morphological variations in the form of extra roots and extra root canals. Favorable endodontic treatment requires extensive study of the internal anatomy of teeth. The literature reiterates the incidence of more than three canals in mandibular molar. Radix entomolaris (RE) may complicate the root canal treatment of the tooth if left undiagnosed. The middle mesial canal is more common when compared to the middle distal canal. The combination of RE and three distal canals is a rare occurrence. This case report presents a discussion of root canal therapy in a left mandibular first molar with RE and five root canals.