Following a professional fluoride application, a period of abstaining from food and drink is typically advised. This waiting period allows the fluoride to be fully absorbed by the tooth enamel, maximizing its protective effects. The specific duration may vary slightly depending on the type of fluoride varnish or gel used.
The purpose of topical fluoride treatment is to strengthen tooth enamel and prevent decay. By allowing sufficient time for absorption, the fluoride has a better chance of remineralizing weakened areas of the teeth, thereby increasing resistance to acid attacks from bacteria and sugars. This contributes significantly to long-term dental health and can reduce the risk of cavities. Historically, fluoride treatments have been a cornerstone of preventative dentistry, helping to reduce the prevalence of tooth decay across populations.