Pathology · single question
Tooth ankylosis is most closely associated with which type of resorption?
Show answer and explanation
Correct answer: A. Replacement resorption
Replacement resorption = root surface replaced by bone, creating bony union (ankylosis). Occurs after dental trauma (avulsion/luxation). Radiograph: loss of PDL space, tooth appears fused to bone. Clinical: dull percussion sound.
- A. CORRECT. Replacement resorption = ankylosis. PDL replaced by bone. Classic post-traumatic finding.
- B. External inflammatory resorption is driven by bacterial infection — progressive external root destruction, not ankylosis.
- C. Cervical resorption occurs at the CEJ area — not ankylosis.
- D. Internal resorption occurs within the canal, creating a balloon-like lucency — not ankylosis.