The chemical used to etch enamel is_______________?
(A) Zinc oxide
(B) Methyl methacrylate
(C) Phosphoric acid
(D) Eugenol
The chemical used to etch enamel is_______________?
(A) Zinc oxide
(B) Methyl methacrylate
(C) Phosphoric acid
(D) Eugenol
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