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Endodontics · single question

Which tooth is MOST likely to have accessory (lateral) canals?

  1. Maxillary first molar (tooth #14/3)
  2. Mandibular second premolar
  3. Maxillary lateral incisor
  4. Mandibular central incisor
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Correct answer: A. Maxillary first molar (tooth #14/3)

  • A. Correct. The MAXILLARY FIRST MOLAR has the highest frequency of accessory/lateral canals — especially in the mesiobuccal root. Its complex multi-root anatomy makes it the tooth most commonly associated with accessory canals.
  • B. Incorrect. Mandibular second premolars have simpler anatomy compared to the maxillary first molar.
  • C. Incorrect. Maxillary lateral incisors are single-canal with relatively few accessory canals.
  • D. Incorrect. Mandibular central incisors have simple root canal anatomy with fewer accessory canals.

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