Deciduous Mandibular First Molar with Single Root and Single Canal: An Astounding Occurrence

Having just one root canal in a primary mandibular first molar is an extremely unusual congenital defect. One possible cause of this odd root shape is the invagination of Hertwig's epithelial root sheath (HERS) failing. A pediatric dentist may successfully provide root canal therapy by drawing on extensive knowledge of root canal evaluation, morphological and anatomical differences of primary teeth, and other relevant topics. Herein, we detail the treatment of a singular root, single canal primary mandibular first molar that presented with a unique morphology. The patient underwent pulpectomy, obturation, and restoration.