Published September 2026

1 of 3After the cleaning, the teeth are dried with a puff of air
  1. After the cleaning, the teeth are dried with a puff of air
  2. A sticky varnish is painted on every surface
  3. It sets on contact with saliva and hardens the enamel for months

Who usually does it

hygienist. Done in general and pediatric offices, usually at a cleaning visit.

One question worth asking

Is fluoride covered at my age on this plan, or is it an out-of-pocket line?

Fluoride and cavity-stopping treatments

Cleanings and gum carePreventiveD1206D1208D1354D1355D5986

Fluoride is painted or brushed onto teeth to strengthen enamel and slow early decay. Silver diamine fluoride is a stronger liquid that can stop a small cavity from growing without drilling.

The teeth are dried and the varnish is painted on in a minute or two; it sets on contact with saliva and keeps working for months. Silver diamine fluoride is a different liquid that can stop a small cavity from growing without drilling, though it stains the treated spot dark. Codes differ by which product is used and whether it is counted per visit, per tooth or per arch. Most plans file this as Preventive. What they actually pay varies by plan.

Fluoride and cavity-stopping treatments: what happens, step by step | TruthMolar