Periodontics · single question

A patient with 2 years of untreated periodontal disease has pain at #29, bone loss, and a periapical abscess on X-ray. Best description of this condition?

  1. Periodontal disease as primary with secondary endodontic involvement
  2. True combined endodontic-periodontic lesion
  3. Primary periodontic lesion
  4. Primary endodontic lesion
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Correct answer: A. Periodontal disease as primary with secondary endodontic involvement

The timeline (untreated perio → periapical abscess) indicates primary periodontal disease with secondary endodontic involvement.
  • A. ✅ CORRECT – Periodontal disease is primary; secondary endodontic involvement developed.
  • B. ❌ True combined means both independently present; this case has perio as the primary driver.
  • C. ❌ Primary periodontic lesion alone would not show prominent periapical abscess.
  • D. ❌ Primary endodontic lesion starts in the pulp; long-standing perio was the initiating factor here.

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