Which one of the following categories of dental materials has the highest thermal conductivity_________________?
Correct answer: D. Gold alloys
- A. Unfilled acrylic plastics
- B. Zinc phosphate cements
- C. Porcelains
- D. Gold alloys
Explanation
Gold alloys are metals with closely packed atoms and therefore conduct heat much more efficiently than acrylic plastics, porcelains, or zinc phosphate cement. Porcelain and acrylic are especially poor thermal conductors.
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