Fluoride Varnish Concentration — NDEB AFK MCQ
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Correct answer: E — 22,600 ppm fluoride (5% NaF)
Fluoride varnish (e.g., Duraphat, Prevident Varnish) contains 5% sodium fluoride (NaF), equivalent to 22,600 ppm fluoride. It is applied as a thin film to tooth surfaces and releases fluoride slowly as it dissolves over several hours. It is the preferred professional fluoride application for children under 6 years (lower fluoride ingestion risk than foams/gels), patients with high caries risk, and patients with hypersensitivity.
Reference: CDA – Fluoride Varnish Position Statement; Health Canada – Fluoride and Oral Health, 2024