During fabrication of a ceramic-alloy restoration,the alloy substructure is degassed in a ceramic oven to:
A) remove organic impurities from the alloy surface.
B) remove hydrogen cyanide gas formed during the metal casting process.
C) promote the formation of an oxide layer on the alloy.
D) do A, B, and C.
E) do both A and C.
Correct Answer:
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