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Endodontics · single question

Which of the following are core objectives/features of proper endodontic access cavity preparation?

  1. Complete removal of the pulp chamber roof AND establishment of straight-line access to the canal orifices, both achieved together
  2. Leaving part of the pulp chamber roof intact for added structural strength
  3. Deliberately creating curved, non-straight access to preserve more tooth structure
  4. Access cavity design has no bearing on instrumentation outcomes
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Correct answer: A. Complete removal of the pulp chamber roof AND establishment of straight-line access to the canal orifices, both achieved together

Proper endodontic access requires BOTH complete removal of the pulp chamber roof (to fully expose all canal orifices and remove necrotic/infected pulp tissue) AND establishment of straight-line access into each canal, which minimizes the risk of canal transportation, ledging, instrument separation, and missed canals during cleaning, shaping, and obturation.

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