Medical MCQ-Why do direct filling golds have to be flamed before insertion into the cavity preparation?

Why do direct filling golds have to be flamed before insertion into the cavity preparation?

To remove contaminants

To make gold soft

To form oxide layer on the surface

All of the above

Question Category:

Dental

Correct Answer:

To remove contaminants

Description:

Proper desorption is a matter of heating long enough at a temperature that removes contaminants and in the case of powdered gold, that burns away the wax. Ref:Phillip’s Science of Dental Materials ed 12 pg 414

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