Restorative & Materials · single question
A radiograph shows a moderately radiopaque restoration. Which material is it most consistent with (glass ionomer)?
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Correct answer: B. Glass ionomer
- A. Incorrect. Amalgam is the MOST radiopaque (metallic, bright white), generally denser than the moderate radiopacity described.
- B. Correct. Glass ionomer is radiopaque but less than amalgam — a moderate radiopacity consistent with this item's context.
- C. Incorrect. Older composites can appear radiolucent; many are only slightly radiopaque, generally less than glass ionomer.
Note: Radiographic differentiation is approximate: amalgam > glass ionomer > many composites.
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