Fluoride Varnish Calculator

Varnish Dose comes from a per-age-bracket base amount -- 0.25mL for children under 6, 0.3mL for ages 6 to 11, and 0.4mL from 12 up, floored at 0.25mL, the smallest deliverable single-use unit dose in real commercial products. It does NOT scale by Number of Teeth: real practice, per the ADA ("a typical application requires 0.2 to 0.5mL, approximately 5 to 11mg [fluoride]"), is to apply a thin film to all erupted teeth from a single unit-dose package and discard the remainder, not to meter out a smaller volume for a patient with fewer teeth. This age-bracket ladder is an illustrative approximation, not a citation to a single commercial product line -- real single-use packages commonly ship as one fixed size (e.g. 0.25mL-only, 0.3mL-only, or 0.5mL-only) rather than a graduated age series, so treat the exact mL figures as a planning estimate, not a specific product's package insert or your clinic's own protocol. Fluoride Delivered converts Varnish Dose into actual fluoride content using the standard 5% sodium fluoride (NaF) varnish concentration -- 22,600 ppm fluoride, or 22.6mg fluoride per mL -- so a 0.25mL dose delivers about 5.7mg of fluoride, consistent with the ADA's cited 5-11mg range for a typical application. This calculator cannot produce a toxic dose: even the largest deliverable amount here is a small fraction of the probably-toxic dose threshold for a young child.

Caries Risk Level plays no role in Varnish Dose at all; it only sets Reapply Interval, following the risk-tiered professional recall intervals in the AAPD's "Caries-risk Assessment and Management" guideline (revised 2022, Tables 3-4): every 3 months at High risk and every 6 months at Moderate risk. The Low-risk interval shown here (annually) is NOT a guideline recommendation -- both the AAPD tables and the ADA's 2013 evidence-based clinical recommendations on topical fluoride agree that low-risk patients may not need any additional professional topical fluoride beyond over-the-counter fluoridated toothpaste and fluoridated water, i.e., the guideline-correct answer for Low risk is "none indicated," not a fixed recall interval. The annual figure shown for Low risk reflects common clinic-discretion practice, not a citation to AAPD or ADA. Applications per Year is 12 divided by Reapply Interval, and Annual Dose multiplies that by Varnish Dose to estimate yearly fluoride supply needs. Neither Patient Age nor Number of Teeth changes Reapply Interval -- that output responds only to Caries Risk Level. Number of Teeth instead drives Application Time: roughly one minute per quadrant of teeth being coated, with a 2-minute floor for the appointment regardless of how few teeth are present.