Multiple canals in a mandibular first premolar. Case report.

It has been recorded that the occurrence rate of more than one canal in the mandibular first premolar varies between different races. This report presents the diagnosis and treatment of a mandibular first premolar with multiple root canals in a young male Asian. It is noted that knowledge of canal morphology, careful interpretation of the radiograph, and tactile sense during treatment constitute the major factors in achieving success with endodontic therapy in cases of complex root canal morphology.