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Endodontics · single question

Which root most commonly contains MULTIPLE (two) canals?

  1. Mesial root of the maxillary second molar
  2. Mesiobuccal root of the maxillary first molar
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Correct answer: B. Mesiobuccal root of the maxillary first molar

  • A. Incorrect. While maxillary molars can have variable anatomy, the classic high-frequency 'extra canal' is in the MB root of the FIRST molar.
  • B. Correct. The mesiobuccal (MB) root of the maxillary first molar very frequently has two canals (MB1 and MB2) — a commonly missed canal in endodontics.

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