Prosthodontics & Occlusion · single question
A patient's denture moves from side to side. Which denture property is most affected?
Show answer and explanation
Correct answer: C. Stability
Denture Stability is the resistance to horizontal (side-to-side, tipping, rotational) forces. If the denture moves from side to side, stability is compromised. Retention is resistance to vertical (dislodging) forces perpendicular to the denture base. Support is resistance to vertical occlusal forces directed toward the ridge. Side-to-side movement = stability problem.
- A. CORRECT. Stability = resistance to lateral/horizontal movement. A denture moving side to side has poor stability.
- B. Incorrect. Retention refers to resistance to vertical dislodging forces (pulling the denture away from the tissue). A denture with poor retention would fall out when the mouth opens.
- C. Incorrect. Support refers to resistance to occlusal/vertical seating forces — preventing the denture from sinking into the tissue.
- D. Incorrect. Esthetics refers to appearance — not a biomechanical property related to denture movement.
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