The ADA specification No 1 for composition of amalgam alloy recommends______________?
Correct answer: C. 65% silver, 29% tin and 5-6% copper
- A. 65% silver, 32% tin and 3% copper
- B. 49% silver, 32% tin and 19% cooper
- C. 65% silver, 29% tin and 5-6% copper
- D. None of the above
Explanation
The traditional ADA composition limits are approximately 65% silver, 29% tin and 5 to 6% copper, with small permissible variations. This is the composition given in option c.
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