Hardening solutions are used with impression made of________________?
Correct answer: A. Hydrocolloid
- A. Hydrocolloid
- B. Impression compound
- C. Elastomer
- D. Zinc oxide eugenol
Explanation
Hydrocolloid impressions may require hardening or setting control through cooling or suitable conditioning solutions, unlike impression compound and elastomers. Alginate is an irreversible hydrocolloid, while agar is reversible.
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