Varnishes & Gels

Fluoride varnishes and gels are fluoride interventions which are professionally applied by dental professionals in surgeries to help prevent tooth decay. Find out more below.

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Varnish - The Facts

Are there any negative side-effects associated with using a fluoride varnish?

If used correctly, there are no negative effects of using a fluoride varnish.

Are there any times when varnish should not be applied to the teeth?

Fluoride varnish should not be applied to the teeth if there are any sore areas in the mouth or if a person has severe asthma or severe allergies that have kept them in hospital.

How does it work?

The varnish provides a source of fluoride which strengthens the surface of the tooth against decay.

How is the varnish applied?

It is applied to the tooth surface in the surgery by a dental professional (dentist/ hygienist/ nurse) using either a small piece of cotton wool or a brush.

What are the benefits of using a fluoride varnish?

If applied twice a year fluoride varnish can reduce decay in baby teeth by 33% and by 46% in the permanent teeth. It is usual to apply fluoride varnish to the teeth of children who already have decayed teeth or are considered to be at increased risk of developing tooth decay.

What is a fluoride varnish?

Varnish is applied to the tooth surface where it sticks and releases fluoride onto the tooth surface. A varnish can contain 25,000 parts per million fluoride.

What should you do after an application of fluoride varnish?

It is advisable to avoid eating, drinking and toothbrushing for at least 30 minutes after an application of fluoride varnish, once last thing at night and on one other occasion.