To prevent porosity in dental porcelain it should be backed________________?
Correct answer: A. In vacuum
- A. In vacuum
- B. Boric oxide
- C. For long period
- D. Under pressure
Explanation
Vacuum firing removes air trapped between porcelain particles and therefore reduces internal porosity. Boric oxide and prolonged firing do not provide the same direct reduction in entrapped air.
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34 free Dental Ceramics MCQs from Dental Materials, each with the correct answer and an explanation. Unlimited attempts, no account needed.
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