Cone-Beam Computed Tomography Study of Incidence of Distolingual Root and Distance from Distolingual Canal to Buccal Cortical Bone of Mandibular First Molars in a Korean Population

Separate DL root is common in the mandibular first molar in a Korean population. Knowledge of the occurrence of DL root and buccal bone thickness can improve the success rate of endodontic microsurgery.