Oral Surgery · single question
What is the MANDIBULAR RIDGE RESORPTION pattern after tooth loss?
Show answer and explanation
Correct answer: B. Centrifugal (outward/downward/anteriorly) — mandible appears to grow
✓ B) Mandibular resorption = centrifugal (outward, downward, anteriorly).
This was already covered in Q63 — key review: MANDIBLE: centrifugal resorption → ridge gets LOWER and appears BROADER over time. The buccal and labial plates are lost, the ridge narrows from the top but the basal bone remains. MAXILLA: centripetal resorption → gets smaller, narrower. This leads to progressive denture instability in long-term complete denture wearers (ridges change) and the reverse jaw relationship (mandible appears prognathic). Denture relining/rebasing is required periodically to compensate for ridge changes.
This was already covered in Q63 — key review: MANDIBLE: centrifugal resorption → ridge gets LOWER and appears BROADER over time. The buccal and labial plates are lost, the ridge narrows from the top but the basal bone remains. MAXILLA: centripetal resorption → gets smaller, narrower. This leads to progressive denture instability in long-term complete denture wearers (ridges change) and the reverse jaw relationship (mandible appears prognathic). Denture relining/rebasing is required periodically to compensate for ridge changes.