Prosthodontics & Occlusion · single question
A removable partial denture is loose, does not seat down, and shifts during chewing. Which design factor is most lacking?
Show answer and explanation
Correct answer: D. Stability
- A. Incorrect. Esthetics is not a denture biomechanical factor; a prosthesis that shifts under function is failing in stability (resistance to horizontal/lateral and rotational forces).
- B. Incorrect – retention resists vertical DISLODGING (lifting away) forces.
- C. Incorrect – support resists vertical (occlusal/tissueward) seating forces.
- D. Correct – resistance to horizontal/functional movement is STABILITY; a prosthesis that 'shifts while chewing' lacks stability.
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