Which of the following statements about high copper silver alloy compared to conventional alloy is not true ?
Correct answer: C. It has poor tarnish and corrosion resistance
- A. It has increased tensile and compressive strength
- B. It's edge strength is greater
- C. It has poor tarnish and corrosion resistance
- D. Mercury content in the final restoration is less
Explanation
High-copper amalgams generally have better resistance to tarnish and corrosion because the tin is tied up in copper-tin phases rather than weak gamma-2. They also have greater strength, edge strength, and lower final mercury content.
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