INBDE (Integrated National Board Dental Examination) Practice Exam

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What is the critical pH level for enamel?

  1. 5.5

  2. 6.2

  3. 7.0

  4. 4.5

The correct answer is: 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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