How often do you apply fluoride varnish for a moderate caries risk patient?

• A. Every 3 months
• B. Every 6 months
• C. Every year
• D. Every 2 weeks

Answer: (B)

For moderate caries risk, the goal is to maintain ongoing fluoride protection without overdoing it. Fluoride varnish provides a quick, high-concentration fluoride boost that helps remineralize early lesions, and its protective effect is best sustained with regular, not overly frequent, applications. Applying it about every six months keeps fluoride levels in the oral environment steady enough to reduce new decay while fitting typical preventive visit schedules. More frequent applications, like every few weeks or months, don’t usually offer extra benefit for moderate risk and add unnecessary cost and burden. Waiting for a year could miss opportunities to arrest progression in active areas, so semiannual application is the balanced, evidence-aligned practice for moderate risk.