ABSTRACT
A case of unusual root morphology is presented to demonstrate anatomic variations in mandibular second molars. The most common configuration of mandibular second molar is to have two roots with three root canals; however mandibular molars may have many different combinations. Endodontic therapy was performed in a mandibular second molar with three separate roots one located mesially and two distally. Radiographically all 3 root canals terminated with individual foramina. Three orifices or 3 independent canals were found in the three separate roots, indicating a rare anatomic configuration. Looking for additional roots, canals and unusual morphology is an important part of successful endodontics, as the knowledge of their existence occasionally enable clinicians to treat a case that otherwise might have ended in failure.