In non zinc containing dental amalgam alloy the percentage of zinc present is______________?
Correct answer: C. Less than 0.01%
- A. Less than 0.02%
- B. Less than 0.1%
- C. Less than 0.01%
- D. None of the above
Explanation
A zinc-free amalgam alloy may contain only a trace amount of zinc, defined as less than 0.01%. Zinc above this level is considered zinc-containing alloy and may contribute to delayed expansion if moisture contaminates the mix.
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