Which of the following is true concerning the hardness of porcelain relative to enamel and dentin?
A) Porcelain is harder than enamel and dentin.
B) Porcelain is harder than enamel but softer than dentin.
C) Porcelain is harder than dentin but softer than enamel.
D) Porcelain is softer than enamel and dentin.
Correct Answer:
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