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Periodontics · single question

Which term best describes the zone from the free gingival margin to the mucogingival junction?

  1. Clinical attachment level (CAL)
  2. Gingival recession
  3. Keratinized gingiva
  4. Non-keratinized gingiva
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Correct answer: C. Keratinized gingiva

  • A. CAL is measured from the CEJ to the base of the pocket — a probing measurement, not an anatomical zone.
  • B. Recession is the distance from the CEJ to the free gingival margin when the gingiva has migrated apically — a measurement, not an anatomical zone.
  • C. Keratinized gingiva extends from the free gingival margin to the mucogingival junction (MGJ). It includes both the free gingiva and the attached gingiva — the entire zone is keratinized or parakeratinized.
  • D. Non-keratinized mucosa begins APICAL to the mucogingival junction, not coronal to it.

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