Just got fluoride varnish at the dentist or home and are wondering how long you need to leave it on?
The short answer is a minimum of 4-6 hours, but below we’ll discuss it in more detail, as it is a bit more complicated.
Maintaining good overall health requires taking proper care of your teeth. Fluoride varnish is a protective coating applied to teeth to prevent cavities.
The CDC reports that one in five people suffer from untreated tooth decay. Fluoride varnish, applied twice a year, can prevent cavities in adults and reduce caries in children.
How Long To Leave Fluoride Varnish on Teeth?
If applied in the dental office, varnish dries in as little as 10 seconds. At-home fluoride applications can last about two minutes. However, that’s just drying, they need care for a minimum of 4-6 hours and that means no brushing or flossing.
Depending on the varnish type, you may even need to wait for 6-24 hours.
How does Flouride Varnish work?
Topical fluorides remineralize enamel and inhibit bacterial metabolism, reducing plaque growth. In other words, it makes your teeth stronger and helps fight plaque-causing bacteria.
These treatments can be given as paste, gel, foam, rinse, or varnish. Fluoride varnish comes in the form of a liquid or gel. It contains a high concentration of fluoride and can be applied as a thin layer directly to the teeth. Fluoride is released into the enamel as it hardens.
In 2013, the ADA Council on Scientific Affairs recommended 5% sodium fluoride varnish as a preventive treatment for caries prevention in adults.
Fluoride varnish can be most effective when used in conjunction with a comprehensive oral hygiene regimen that includes fluoride toothpaste, flossing, normal dental care, and a balanced diet. It cannot, however, totally prevent cavities.
Who can benefit from fluoride varnish application?
Fluoride treatments are beneficial for all age groups, including those with excessive wear, thin tooth enamel, poor oral hygiene, dry mouth, or dental sensitivity after professional cleaning, enamel injury, or exposed dentine.
They can be performed at schools or daycare centers. Fluoride varnish is a non-invasive, quick, and simple treatment to stop existing tooth decay from getting worse. Studies show that it reduces dental caries prevalence in primary teeth by 37% and permanent teeth by 43%.
Benefits of Fluoride Varnish
Fluoride varnish is used to prevent caries development. Fluoride varnish is also recommended for arresting or reversing non-cavitated lesions in primary and permanent teeth and arresting early enamel and even soft dentine caries through the promotion of remineralization of carious tooth substance. It is also used to treat tooth hypersensitivity.
Fluoride varnish Application Process
Fluoride varnish is applied to teeth after routine cleaning. It is dried with gauze and is typically applied twice yearly, dries quickly, and the whole thing takes less than two minutes.
Post-application instructions
- Do not brush or floss for at least 4-6 hours. If possible, wait until the next morning to resume brushing and flossing.
- Do not eat or drink anything for the next 30 minutes after application. After that, stick to a soft diet for the rest of the day.
- Don’t have any hot drinks, alcohol, acidic juices, and carbonated beverages for the rest of the day.
Recommended Duration for Leaving Flouride Varnish on Teeth
Professional application: The dentist or the hygienist dries your teeth with a cotton sponge to remove any biofilm.
Then, they apply a thin coat of varnish evenly to all desired tooth surfaces, let it dry for 10 seconds, and then you are done. Total time? About 2 minutes.
The varnish hardens on contact with saliva, so patients can leave immediately. Patients should consume soft foods and drink cold liquids for two hours post-treatment but nothing for at least 30 minutes after the application.
At-home application: Apply the fluoride varnish after routine cleaning, and after drying the teeth with a gauze. It dries quickly and takes less than two minutes. (At-home varnish applications are not as common, most are performed at a dental office)
Frequency of application: The ICDAS Foundation recommends professional application twice a year for moderate caries risk, and four times a year for high risk.
FAQ’s
Why is fluoride varnish application recommended?
Cavities can result in discomfort and infections and affect one’s day-to-day life. Fluoride varnish strengthens teeth, stops the progression of cavities, and helps prevent cavities from developing again.
Is fluoride varnish safe?
Yes, varnish with fluoride is safe for all, kids, adults, and even pregnant women. Speak with your dentist or physician if you have any questions or concerns about using fluoride varnish.
How is fluoride varnish applied?
Teeth are treated with fluoride varnish with a brush by a dentist, dental hygienist, physician, or nurse with training. There is no discomfort or unpleasant taste, and the procedure is quick and simple. Teeth that have a varnish applied to them may appear momentarily discolored or less glossy. These are natural alterations that will disappear the next day when the teeth are brushed.
How long does fluoride varnish last?
Teeth stay protected for several months by fluoride varnish. It protects your teeth best when administered every three to six months.
