Endodontic enigma : mandibular second premolar with three root canals: a case report.

Location and thorough instrumentation of all the canals in the root of a diseased tooth normally ensure success of the endodontic therapy. Present case was referred for endodontic therapy of mandibular second premolar. Clinical and radiographic examination revealed inadequate root canal filling. Three canals were located. Endodontic therapy was performed under aseptic conditions.