Which one of the following restorative materials is having coefficient of thermal expansion close to that of tooth enamel and dentin ?
Correct answer: D. Type II Glass ionomer cement
- A. Microfilled composite resins
- B. Pure gold
- C. Silver amalgam
- D. Type II Glass ionomer cement
Explanation
Type II glass ionomer cement has a coefficient of thermal expansion relatively close to that of enamel and dentin, reducing thermal mismatch at the tooth-restoration interface. Microfilled composites, gold and amalgam generally have larger differences.
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