Bilateral Single-Rooted Primary Mandibular Molars: A Rare Morphological Variant

Primary mandibular molars usually present with two roots; however, rare anatomical variations such as a single root with a single canal have been reported. This case report describes a rare bilateral occurrence of single-rooted mandibular primary first molars in a 6-year-old female patient. Clinical and radiographic examination revealed deep carious lesions in teeth 74 and 84 with Vertucci Type I canal configuration. Tooth 84 was diagnosed with chronic irreversible pulpitis and was treated with pulpectomy using zinc oxide eugenol followed by stainless steel crown placement. Tooth 74 showed deep dentinal caries approaching the pulp and was managed conservatively. This report highlights the importance of recognizing such rare root morphology for accurate diagnosis and appropriate endodontic management in pediatric dentistry.