The impression materials with lowest viscosity is_____________?
Correct answer: A. Plaster of paris
- A. Plaster of paris
- B. Agar - agar
- C. Zinc oxide eugenol
- D. Elastomers
Explanation
Impression plaster has the lowest viscosity among these choices, so it flows readily over tissues and into fine surface details. Elastomers are supplied in different viscosities, but are not generally the lowest-viscosity group.
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