PH of polycarboxylate liquid is____________?
Correct answer: D. 1.7
- A. 5
- B. 7
- C. 8
- D. 1.7
Explanation
Polycarboxylate cement liquid contains aqueous polyacrylic acid and is strongly acidic, with a pH around 1.7. Despite this low initial pH, its large polyacrylic-acid molecules penetrate dentinal tubules less readily than phosphoric acid.
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