KHN of enamel is close to______________?
Correct answer: D. Prcelain
- A. Pure gold
- B. Amalgam
- C. Composite
- D. Prcelain
Explanation
Enamel has a Knoop hardness value closest to porcelain among these choices. Gold, amalgam and composite resin are considerably softer, making porcelain the intended comparison.
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