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Endodontics · single question

What is the most definitive way to CONFIRM pulp NECROSIS?

  1. Transillumination
  2. Cavity (drill) test
  3. Palpation test
  4. Percussion test
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Correct answer: B. Cavity (drill) test

  • A. Incorrect. Transillumination detects cracks and gross structural changes but is not the most definitive test for necrosis.
  • B. Correct. The CAVITY TEST (drilling into the tooth without anesthetic and probing the pulp) is the MOST DEFINITIVE method to confirm pulp NECROSIS. A necrotic pulp has no response to drilling — no pain. If sensation is felt, the pulp is vital. This is used when other tests give equivocal results. (Note: EPT is useful but can give false positives in partially vital teeth.)
  • C. Incorrect. Palpation assesses apical tenderness and swelling — not pulp vitality directly.
  • D. Incorrect. Percussion tests periapical status (tenderness to percussion) — not specifically pulp vitality.

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