Restorative & Materials · single question
How does saliva contribute to enamel remineralization?
Show answer and explanation
Correct answer: D. Contains calcium and phosphate ions that deposit back into demineralized enamel
Saliva is SUPERSATURATED with Ca2+ and PO43- at physiologic pH. When pH recovers above 5.5 after acid attack, saliva's buffering capacity (bicarbonate) raises pH, and calcium/phosphate ions deposit back into partially demineralized enamel crystal lattice = REMINERALIZATION. Fluoride enhances this by forming fluorapatite.
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