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

<table>(a) Preoperative radiograph of tooth 19. (b) Access opening showing four canals (MBR: Mesiobuccal; MLR: Mesiolingual; DBR: Distobuccal; DLR: Distolingual). (c) Working length radiograph of tooth 19 in eccentric angulation. (d) Postobturation radiograph.</table>

Case Reports in Dentistry

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Figure 1

Figure 1: Four-Rooted Mandibular First Molar with an Unusual Developmental Root Fusion Line: A Case Report 