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Case Reports in Dentistry
Volume 2012 (2012), Article ID 237302, 4 pages
Case Report

Four-Rooted Mandibular First Molar with an Unusual Developmental Root Fusion Line: A Case Report

Department of Conservative Dentistry and Endodontics, Meenakshi Ammal Dental College, Chennai 600096, India

Received 10 March 2012; Accepted 8 May 2012

Academic Editors: L. Junquera and K. Yamazaki

Copyright © 2012 Jojo Kottoor et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The paper describes the anatomical variation of four roots in a mandibular permanent first molar diagnosed using multiple angulated preoperative radiographs and its successful nonsurgical endodontic management. Careful observation and exploration of the pulpal floor using a dental operating microscope revealed a peculiar developmental root fusion line on the pulp chamber floor. Based on the above observation, a correlation between this unusual line and the existence of additional roots has been proposed and discussed.