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Endodontics · single question

In the mandibular first molar (tooth #30), two canals are most commonly found in which root?

  1. Mesial root
  2. Distal root
  3. Palatal root
  4. Mesiobuccal-only root
Show answer and explanation

Correct answer: A. Mesial root

  • A. Correct. The MESIAL root of the mandibular first molar most often contains TWO canals (mesiobuccal and mesiolingual). The distal root usually has one (sometimes two).
  • B. The distal root typically has a single canal.
  • C. Mandibular molars have NO palatal root (that is a maxillary feature).
  • D. 'Mesiobuccal-only' is incorrect — it is the mesial root (containing MB and ML canals) that has two.

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