>>45674
>Doesn't "recalcifize". Bones and teeth needs calcium and phosphorus, no fluoride (zero).
Because enamel is not just calcium phosphate.
Normally enamel is hydroxylised, there are OH⁻ groups added to the calcium phosphate. It is hydroxyapatite.
But if you add fluoride, the fluoride will start replacing the OH⁻ groups. It will turn hydroxyapatite into fluoroapatite.
Fluoroapatite is more resistant to chemical wear, which is why dentists want you to fluoridise your teeth.