INBDE (Integrated National Board Dental Examination) 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 1180

What is the critical pH level for enamel?

5.5

The critical pH level for enamel is 5.5. At this pH level, the enamel begins to demineralize, leading to the breakdown of the tooth structure. The pH scale ranges from 0 to 14, with 7 being neutral. pH levels below 5.5 are considered acidic and can result in enamel erosion. Option B (6.2), Option C (7.0), and Option D (4.5) are not the critical pH level for enamel breakdown.

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6.2

7.0

4.5

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