Clinical Management of a Mandibular Second Molar with Three Mesial Canals: A Case Study

Most mandibular second molar has two canals in mesial root and one in distal. This report represents a case of mandibular second molar with three mesial and two distal root canals. To achieve the ideal goal of endodontic treatment, clinicians should be aware of the complicated configuration of the root canal system and use suitable methods to identify the accessory canals that exist possibly.