Fluoride varnish application
Topical 22,600 ppm fluoride varnish for caries prevention.
Time
2–5 min
Anaesthetic
Not needed
Key kit
5% NaF varnish (22,600 ppm F), brush, gauze
Frequency
At least twice yearly; 2–4× for high-risk (see guideline)
Before you start
- • Caries risk assessment
- • Avoid if ulcerative gingivitis/stomatitis or colophony allergy history
- • Paediatric: check dose per unit (about 0.25 ml under 6, 0.4 ml older)
Steps
- 1
Clean
Remove plaque by brushing; no prophylaxis paste needed.
- 2
Dry
Dry teeth with gauze or air; isolate with cotton rolls.
- 3
Apply
Paint a thin layer on all surfaces, starting with high-risk areas.
- 4
Set
Varnish sets on contact with saliva.
Aftercare
- • No eating or drinking for 30 min; no brushing until next day
- • Toothpaste fluoride advice by age
Sources
- Delivering Better Oral Health — an evidence-based toolkit for prevention (OHID)UK
- ADA — Clinical practice guideline on topical fluoride for caries prevention (2013)US
Checked on 2026-10-22.
General guide summarised from the sources above. Follow your training and local protocols.