Restorative & Materials · single question
On a dental radiograph, how can you distinguish a composite restoration from a GIC (glass ionomer cement) restoration?
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Correct answer: A. GIC is radiopaque; composite appears radiolucent
- A. ✅ Correct. Glass ionomer cement is radiopaque (due to barium, strontium, or zinc fillers), while traditional composite is radiolucent. On x-ray, GIC appears brighter/whiter; composite appears darker/transparent.
- B. ❌ They do not appear equally — GIC is distinctly more radiopaque.
- C. ❌ GIC is radiopaque, not radiolucent.
- D. ❌ This is reversed. Traditional composites are radiolucent, while GIC is radiopaque.
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