Mandibular molar with merging mesiobuccal and distal root canals

Abstract

Abstract A lower 2nd molar with an anomalous root canal anatomy is described. The floor of the pulp chamber showed the usual anatomic configuration with 2 mesial and 1 distal canal orifices. The mesiolingual canal had a normal course. However, the mesiobuccal and the distal canals merged to form 1 single canal in the apical 3 mm of the root.