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Endodontics · single question

Which of the following is an essential feature of endodontic access preparation?

  1. Remove only part of the chamber roof to preserve tooth structure
  2. Achieve straight-line access to the root canals
  3. Access should be as small as possible to preserve enamel
  4. The access should always be through the palatal surface of maxillary teeth
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Correct answer: B. Achieve straight-line access to the root canals

Straight-line access to the root canals is one of the most critical principles of endodontic access. The access cavity must provide direct, unimpeded access from the chamber to the apical foramen without instrument deflection or ledging. Removing all of the chamber roof (deroofing) is required to achieve this. Inadequate access leads to missed canals, instrument separation, and treatment failure. Complete deroofing (removing all of the chamber roof) is required.

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