Initiation of fluoride varnish should occur around which age range?

• A. 0-3 months
• B. 6-9 months
• C. 12-24 months
• D. 24-36 months

Answer: (B)

Starting fluoride varnish when the first primary tooth erupts is most effective, which typically occurs around 6–9 months of age. Newly erupted enamel is especially vulnerable to demineralization, and applying a fluoride varnish at this time provides targeted fluoride to the tooth surface, promoting remineralization and helping establish caries protection early. Fluoride varnish is quick to apply, safe for infants, and can be done during routine visits, making it practical to begin preventive care at this early stage. Waiting longer misses the window when the first teeth are most at risk, while applying before teeth erupt isn’t possible. After the initial start, follow-up applications are guided by caries risk and current recommendations.