What is the main function of a dental varnish?

The main function of dental varnish is to provide a protective coating on the surfaces of teeth, particularly after procedures like cavity fillings. It helps to seal dentinal tubules, reducing sensitivity and minimizing the risk of bacterial penetration. Additionally, dental varnish can release fluoride, which aids in remineralizing enamel and preventing decay. Overall, it enhances the longevity of dental restorations and improves oral health.