Endodontics · single question

Which tooth carries a greater chance of sodium hypochlorite extravasation beyond the apex during root canal treatment?

  1. Maxillary lateral incisor (curved root anatomy)
  2. Maxillary canine
  3. Mandibular premolar
  4. Mandibular molar
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Correct answer: A. Maxillary lateral incisor (curved root anatomy)

The maxillary lateral incisor frequently has a notably curved root, increasing the risk of apical perforation, ledging, or transportation during instrumentation/irrigation — any of which can create a pathway for sodium hypochlorite to be inadvertently extruded beyond the apex into periapical tissue, a well-known endodontic emergency.

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