Q
In a metal ceramic crown for a FPD the function of tin, indium which are readily oxidized minor constituents is to________________?
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A
A. Improve bonding
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B
B. Decrease porosity
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C
C. They react with the porcelain opaque layer, which masks the metal
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D
D. Improves the thermal expansion between the metal and porcelain
Correct Answer:
A. A. Improve bonding