Prosthodontics & Occlusion · single question
The metal framework for a removable partial denture (RPD) is most commonly fabricated from which type of alloy?
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Correct answer: A. Base metal alloy (cobalt-chromium)
- A. Base metal alloys — primarily cobalt-chromium (Co-Cr) and sometimes nickel-chromium — are the standard materials for RPD frameworks. They are strong, lightweight, rigid, biocompatible, and cost-effective. ✓
- B. Semi-precious alloys are used for some crown and bridge work but are not the standard for RPD frameworks.
- C. Titanium RPD frameworks exist but are specialized and expensive — not the standard material tested on boards.
- D. Noble metal alloys (gold-based) are too soft, expensive, and heavy for RPD frameworks — they are used for cast full-coverage crowns.
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