Endodontic management of two-rooted mandibular premolars using spiral computed tomography: a report of two cases.

Aim: To present a unique case of mandibular first and second premolars with two roots and two root canals with the aid of spiral computed tomography (SCT).

Background: Confirmation of morphology of mandibular first and second premolars with the aid of SCT.

Case Description: Mandibular premolars usually have a single root and a single canal.