Root canal therapy of a supernumerary tooth fused with maxillary second molar: a case report

Presented in this report is a referral case of maxillary second molar with developmental anomaly. A small crown of a supernumerary tooth fused to the second molar on its buccal side. The unusual morphology and complicated root canal system rendered diagnosis and treatment difficult. Periapical radiography and cone-beam computed tomography were employed for the evaluation, diagnosis and treatment planning in this case. Micro-ultrasound instrument and operating microscope helped us handle unusual complexities of the root canal system. The radiological examinations, in combination with other state-of-art clinical instruments clearly revealed the anatomical anomalies and successfully assisted the treatment.