Impression material that Do NOT harden by chemical reaction_______________?
Correct answer: B. Impression compound
- A. Zinc oxide eugenol
- B. Impression compound
- C. Alginate
- D. Plaster of paris
Explanation
Impression compound hardens by physical cooling rather than by a chemical reaction, so it can be softened and reused. Zinc oxide eugenol, alginate, and plaster set through chemical reactions.
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