The basic constituent of reversible hydrocolloid impression material is________________?
Correct answer: D. Agar
- A. alginate
- B. Alginic acid
- C. Gelatin
- D. Agar
Explanation
Agar is the principal gel-forming constituent of reversible hydrocolloid impression material. Alginate and alginic acid belong to irreversible hydrocolloids, while gelatin is not the basic constituent of dental agar material.
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