What is the primary function of fluoride varnish in dental care?

The primary function of fluoride varnish in dental care is to release fluoride onto enamel and root structures. Fluoride is known for its ability to strengthen tooth enamel and help prevent dental caries by making the enamel more resistant to acid attacks from bacteria in the mouth. When fluoride varnish is applied, it adheres to the surface of the teeth, allowing for a controlled release of fluoride over time, which enhances the remineralization process. This is especially beneficial for individuals at higher risk for cavities, as it provides a protective layer that can help fortify both enamel and root surfaces against decay.

Other options, such as whitening tooth enamel or acting as a filler for cavities, misinterpret the role of fluoride varnish in dental treatment. While desensitizing the gums might be a potential benefit of some fluoride treatments, the primary and most recognized function remains the release of fluoride to aid in the protection and strengthening of dental structures.