Diagnosis

Patient presented with a non-vital pulp and chronic apical periodontitis. The pre-operative radiograph showed a radiolucent area surrounding the apical third of the root and advanced horizontal bone loss on the distal. The mesial root displayed a double curvature and there was a sharp dilaceration of the distal root with the canal exiting on the inferior aspect. 

Treatment

Three canals were located and instrumented. The postoperative radiograph displays the sharp dilaceration of the distal root and the inferior portal of exit that was cleaned and obturated.