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

الملخص EN

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.