Restorative & Materials · single question
A bruxist patient has a crown on tooth #6 with marginal discoloration. The most likely cause is:
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Correct answer: A. Parafunctional wear exposing the underlying metal/amalgam core or dentin
- A. Correct. Heavy bruxism can wear through the crown's facing/margin, exposing the metal or amalgam core and the underlying dentin, which shows as discoloration.
- B. Incorrect. Tetracycline stains developing natural dentin, not a fabricated crown.
- C. Incorrect. Fluorosis affects developing enamel, not a restoration.
- D. Incorrect. Translucency is an esthetic property, not focal marginal discoloration from wear.
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