Why is fluorapatite more resistant than hydroxyapatite?

Why is fluorapatite more resistant than hydroxyapatite?

Because fluorapatite is less soluble than hydroxyapatite, it is also more resistant to subsequent demineralization when acid challenged (Figure 4). Figure 4. Fluoride Reactivity.

Is nano hydroxyapatite better than hydroxyapatite?

In regard to protecting teeth prevent tooth decay, Nano-HAp is less resistant to acid than fluoride. Fluoride creates a dense zone of protection above whereas hydroxyapatite penetrates to the very bottom.

Why is fluorapatite good for teeth?

The presence of fluorapatite helps prevent tooth decay or dental caries. Fluoroapatite has a critical pH of 4.5, thus it makes tooth structure more resistant to additional caries attack.

Why is fluorapatite less soluble than hydroxyapatite?

Here’s why: The amount of fluoroapatite, another mineral present in enamel, reduces the critical pH because fluoroapatite (Ca5(PO4)3F) is free of hydroxide. It is less soluble than calcium hydroxyapatite in acidic conditions.

Is fluoride or hydroxyapatite better?

Fortifies enamel: Hydroxyapatite can increase the microhardness of enamel. The coating of hydroxyapatite reinforces the teeth better than the fluorapatite coating. Non-toxic: Hydroxyapatite is biomimetic. There are no side effects with hydroxyapatite—in fact, it’s safe enough to swallow the entire tube of toothpaste!

Is fluorapatite soluble?

Fluorapatite is a highly insoluble calcium phosphate phase. The solubility product of stoichiometric fluorapatite at 37°C is 3.19 ± 0.14×10−61mol l−1 (for Ca5(PO4)3F as reported by Moreno et al.

Is nano hydroxyapatite safer than fluoride?

In terms of restorative and preventive dentistry, nano-hydroxyapatite has significant remineralizing effects on initial enamel lesions, certainly superior to conventional fluoride, and good results on the sensitivity of the teeth.

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