In regard to topically applied fluoride, which statement is true?

Topically applied fluoride plays a crucial role in dental health, especially in remineralizing enamel and preventing tooth decay. The statement emphasizing that fluoride inhibits acid demineralization of enamel is true because fluoride ions can incorporate into the structure of enamel, making it more resistant to acid attacks from bacteria that produce acids from sugars. This resistance helps counteract the process of demineralization that leads to cavities.

When fluoride is applied topically, it interacts with the enamel surface and promotes the formation of fluoroapatite, which is less soluble in acid than the hydroxyapatite that makes up enamel. Thus, the presence of fluoride can significantly reduce the amount of enamel loss during acidic episodes, effectively protecting the teeth from caries.

In contrast, the other statements don't align with the established benefits of fluoride. For instance, while fluoride enhances remineralization, it does not effectively get incorporated into dental plaque in a way that alters its properties significantly. Additionally, fluoride is known to inhibit bacterial growth rather than enhance it. Finally, while fluoride can help some individuals with sensitivity over time through its long-term benefits to enamel, it is not primarily noted for directly diminishing tooth sensitivity in acute situations. Overall, the primary mechanism of fluoride in dental health is its