Varnish and Brushing Timing — ORE Part 1 MCQ

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EasyDental Public Health & EpidemiologyVarnish and Brushing TimingORE Part 1

Following application of fluoride varnish, what advice should be given about brushing with fluoride toothpaste?

Educational content. Not a substitute for clinical judgement or local policy.

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Correct answer: B — Wait at least 4 hours before brushing teeth

The correct advice is to wait at least 4 hours before brushing after fluoride varnish application. This allows the varnish to remain on the tooth surfaces and maximise topical fluoride exposure. Fluoride toothpaste remains part of routine caries prevention and is not replaced by professionally applied varnish. Immediate brushing would remove or disrupt the varnish prematurely. Waiting until the following morning may be compatible with a four-hour minimum in some appointment timings, but it is not the specific recommendation and may be unnecessarily restrictive. Avoiding fluoride toothpaste for a week is unsupported.

Reference: Scottish Dental Clinical Effectiveness Programme (SDCEP), Prevention and Management of Dental Caries in Children, "Fluoride varnish" section, 2026. https://www.childcaries.sdcep.org.uk/guidance/caries-prevention/professionally-delivered-interventions/fluoride-varnish/