Which statement is true regarding fluoride’s effect on enamel?

Fluoride's ability to enhance enamel strength when incorporated into its structure is well-documented. When fluoride is present during the formation of enamel, it can substitute for hydroxyl ions in the hydroxyapatite crystal structure, forming fluorapatite. This fluorapatite is more resistant to acid attack, which strengthens the enamel and reduces the risk of demineralization.

The presence of fluoride not only contributes to the initial development of stronger enamel but also aids in the remineralization process when enamel begins to demineralize after acid exposure from plaque bacteria. This reinforces the protective qualities of enamel and improves its resilience against caries development.

Understanding this aspect is vital because it highlights the significance of fluoride in caries prevention and the overall maintenance of oral health.