What is the PH at which initiation of caries begin ?
Correct answer: B. 5.2-5.5
- A. 4.3-4.5
- B. 5.2-5.5
- C. 4.9-5.1
- D. 3.5-4.5
Explanation
Enamel begins to demineralize at the critical pH of approximately 5.5, represented by the range 5.2–5.5. Values around 4.3 are more characteristic of the critical pH for root dentin or cementum rather than enamel.
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