Percentage of zinc in ZOE cement is__________________?
Correct answer: B. 70%
- A. 60%
- B. 70%
- C. 80%
- D. 90%
Explanation
Zinc oxide forms about 70% of the ZOE cement powder, with the remainder mainly consisting of resin, zinc acetate and other additives. Therefore, 70% is the closest standard value.
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