Restorative & Materials · single question
Which represents the mechanism of fluoride in caries prevention?
Show answer and explanation
Correct answer: A. Decreases dissolution of calcium phosphate (forms acid-resistant fluorapatite)
- A. Correct. Fluoride incorporates into enamel forming fluorapatite, which is LESS soluble in acid — decreasing demineralization and enhancing remineralization.
- B. Incorrect. Fluoride decreases (not increases) acid dissolution.
- C. Incorrect. Fluoride does not reduce hydroxyapatite availability; it converts/strengthens the mineral.
- D. Incorrect. Fluoride substitutes for hydroxyl ions (forming fluorapatite); it does not increase hydroxyl content.
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