The "radiculous" maxillary first premolar: A rare anatomic variation.

Premolars have highly variable root canal morphology, but the presence of three roots is rare. This article describes the diagnosis and clinical management of a maxillary first premolar with three canals and three separate roots, with special reference to radiographic interpretation and access refinements. The authors' detection of multiple roots in all of the patient's premolars made this case unique. It is suggested that all general practitioners look for a similar anatomic variation in contralateral and opposing teeth as well.