Final answer:
Fluoride varnish offers potential advantages over gels including fewer and less severe cavities, and reduced dental interventions like fillings or extractions. It facilitates the remineralization of enamel and is effective against bacteria, with stannous fluoride noted for its efficacy in caries reduction and gingivitis control.
Step-by-step explanation:
The benefits of fluoride varnish applications as compared to gels include fewer cavities, less severe cavities, a reduced need for fillings and tooth extractions, as well as less pain and suffering due to tooth decay. Fluoride functions by becoming part of the tooth enamel and making it more resistant to the acids produced by oral bacteria. Moreover, fluoride varnish has a higher concentration of fluoride, provides a longer contact time with the teeth, and is less likely to be ingested than gels, making it a safer and more effective choice for cavity prevention.
Because fluoride varnish is able to enhance the uptake of calcium and phosphate ions, it promotes the remineralization of tooth enamel. This not only strengthens the enamel but also impedes bacteria from producing cavity-causing acids. Stannous fluoride in particular, although associated with more surface stains, has been shown to be highly effective in reducing dental caries and managing gingivitis.