Endodontic treatment of bilaterally occurring three-rooted maxillary premolars: a case report.

The possibility of bilateral maxillary first premolars having three separate roots is quite low; however, it must be taken into account in clinical and radiographic evaluations during endodontic treatment. This case report describes the presence of three roots occurring bilaterally in maxillary first premolars in one patient, drawing particular attention to radiographic interpretation and access refinements. The case report underlines the importance of complete knowledge about root canal morphology and possible variations, coupled with clinical and radiographic examination in order to increase the ability of clinicians to treat difficult cases.