Permanent maxillary first molar with single root and single canal: a case report of a rare morphology.

Unusual root canal morphology in multirooted teeth is a constant challenge for diagnosis and successful endodontic treatment. Presence of extra canals, lateral canals, deltas is commonly encountered but the possibility of existence of fewer number of roots and canals also exists. This clinical report presents a maxillary first molar with an unusual morphology of single root with single canal. This report also highlights the role of spiral computerized tomography as a method to confirm the three-dimensional anatomy of teeth.