Fluoride-enhanced remineralization is dependent on?

• A. The availability of phosphate & calcium ions
• B. The availability of vitamin D
• C. The rate of plaque formation
• D. The amount of swallowed fluoride

Answer: (A)

Fluoride-enhanced remineralization hinges on having a ready supply of the minerals that rebuild tooth structure. When enamel has been demineralized, calcium and phosphate ions in saliva and dental plaque are the building blocks that reform crystal minerals. Fluoride helps speed and stabilize this rebuilding, but it cannot occur effectively without those ions being available locally. So the key factor is the presence of calcium and phosphate ions in the mouth to redeposit into the enamel.

Vitamin D affects systemic calcium handling, but it doesn’t directly supply the local ions needed for remineralization at the tooth surface. The rate of plaque formation and the amount of swallowed fluoride don’t provide the essential mineral substrates, so they’re not the primary determinants of fluoride-driven remineralization.