Brush heap structure is found in______________?
Correct answer: B. Agar
- A. Zinc oxide impression material
- B. Agar
- C. Condensation silicone
- D. Polyether
Explanation
Agar forms a gel with a characteristic brush-heap or fibrillar structure when cooled. This structure is associated with its reversible hydrocolloid gel network, not with elastomeric materials.
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