What is fluoride varnish primarily used for?

Fluoride varnish is primarily used to prevent tooth decay and strengthen enamel. This topical application of fluoride is particularly effective in enhancing the remineralization of tooth surfaces, which helps combat the demineralization process that leads to cavities. The fluoride ions in the varnish interact with the hydroxyapatite crystals in the enamel, transforming them into a more resilient form known as fluorapatite. This not only helps to repair early stages of tooth decay but also provides a protective layer that makes the enamel more resistant to acidic attacks from bacteria and dietary sugars.

While other treatments may address issues such as teeth whitening, sensitivity relief, or bad breath, fluoride varnish's primary and most significant role is in caries prevention and enamel fortification. Its application is especially recommended for children at higher risk of dental cavities, making it a crucial part of preventive dental care.