Endodontic management of the maxillary first molar with special root canals: A case report and review of the literature

Figure 1 Clinical and X-ray images showing the treatment process. A: Preoperative radiograph of the left maxillary first molar; B: Access opening showing two mesiobuccal root canals (MB1, 2), one distobuccal root canal, and one entrance on the 1-2-1-shaped palatal canal (black arrow); C-E: Working length radiograph (C), postobturation radiograph (D), and postobturation clinical image (E) of the left maxillary first molar; F: Postobturation radiograph of the tooth at 1 year. MB: Mesiobuccal; DB: Distobuccal.