Prosthodontics & Occlusion · single question
A patient wearing a cobalt-chromium partial metal framework develops an allergic reaction. What is the MOST likely causative metal?
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Correct answer: B. Nickel
Nickel is the most common metal allergen in dental and jewelry contexts. Cobalt-chromium RPD frameworks contain nickel, which is the most frequent cause of metal hypersensitivity.
- A. Palladium sensitivity exists but is less prevalent than nickel sensitivity in the general population.
- B. CORRECT. Nickel is the most common metal allergen. Contact hypersensitivity and dermatitis to cobalt-chromium RPD frameworks are most commonly attributed to the nickel component of the alloy.
- C. Cobalt can cause sensitivity but is much less common than nickel as an allergen.
- D. Chromium oxide forms a passive, generally biocompatible layer and rarely causes reactions.
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