Maxillary First Molar Canal Complexity — NDEB AFK MCQ
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Correct answer: E — Maxillary first molar
The maxillary first molar has the most anatomically complex root canal system due to its three roots (mesiobuccal, distobuccal, palatal), with the mesiobuccal root frequently containing a second canal (MB2) in 60-70% of cases. The MB2 canal is often calcified, has a separate orifice that is difficult to locate, and is the most commonly missed canal in endodontics. The palatal root typically has a single large canal, and the distobuccal root usually has one canal.
Reference: Torabinejad – Endodontics: Principles and Practice, 6th ed., 2021