What is the role of topical fluoride varnish in preschool dental prevention?

• A. Reduces caries risk; applied in dental visits, typically every 3–6 months depending on risk
• B. Stains teeth to make them appear whiter
• C. Causes fluoride overdose
• D. Replaces brushing

Answer: (A)

Topical fluoride varnish works by delivering a high concentration of fluoride directly to tooth surfaces, enhancing remineralization and making enamel more resistant to acid attacks. In preschool prevention, it’s applied during dental visits and is typically done every 3–6 months depending on the child’s caries risk. The varnish sets quickly and minimizes swallowing, offering local protection with minimal systemic exposure. It is not a whitening product and does not stain teeth as a goal; any temporary chalky residue is harmless and fades. When used correctly, it does not cause fluoride overdose. It should be part of a broader prevention plan that includes brushing with fluoride toothpaste and healthy dietary habits rather than replacing those practices. Higher-risk children may benefit from more frequent applications, while lower-risk children may need it less often.