Restorative & Materials · single question
In root-surface (dentin/cementum) caries, demineralization begins at a higher critical pH than enamel. That approximate critical pH is:
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Correct answer: C. 6.2–6.7 (about 6.5)
- A. Too low; this is below even enamel's critical pH.
- B. 5.5 is the critical pH for ENAMEL.
- C. Correct. Root surface (dentin/cementum) demineralizes at a higher pH, roughly 6.2–6.7.
- D. 7.4 is neutral-to-basic; no demineralization occurs.
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