Which of the following is a method of topical fluoride application?

• A. Fluoride varnish
• B. Fluoride foam administered in lined trays
• C. Home fluoride (paste, rinse)
• D. All of the above

Answer: (D)

Topical fluoride therapy means applying fluoride directly to the tooth surface to enhance remineralization and prevent demineralization. Fluoride varnish is a professional topical product applied to teeth and left to release fluoride over time. Fluoride foam in lined trays is another topical method that coats all tooth surfaces for a period, delivering fluoride where it’s needed. Home fluoride products, like toothpaste and mouth rinses, provide daily topical exposure as they contact the tooth surfaces during regular brushing or rinsing. These approaches all deliver fluoride directly to the tooth surface rather than through ingestion and systemic distribution. Therefore, all of the listed options are methods of topical fluoride application.