MICRO-ENDODONTIC MANAGEMENT OF A FUSED MANDIBULAR MOLAR WITH RARE ANATOMICAL FEATURES: A CASE REPORT

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This case report describes non-surgical micro-endodontic treatment of a mandibular second molar that had a disto-lingually rotated crown fused with another single-rooted tooth at the central buccal aspect. Cone-beam computed tomography (CBCT) demonstrated C-shaped root configuration with two ribbon-shaped canals, and the distal canal joined to the open-apex canal of the "extra" tooth. Under a dental operating microscope, selective ultrasonic instrumentation of the fin-like canal areas and placement of an apical plug with mineral trioxide aggregate were performed, resulting in complete radiographic healing. This report highlights that dental operating microscopic magnification, aided with CBCT, is an absolute prerequisite for implementing contemporary treatment strategies according to given anomalous morphology, and thereby for overcoming endodontic challenges associated with fused teeth.