Enamel remineralisation: how to protect your teeth

Your enamel gains and loses minerals throughout the day. Acids can remove minerals, while saliva and fluoride help protect the surface and support repair of early mineral loss. This process is called remineralisation.

There is a limit to what it can do. An early area of decay may be stopped or reversed before a cavity forms, but missing enamel does not simply grow back. A hole, broken tooth or substantial wear needs a dental assessment and may require a restoration.

Why does enamel lose minerals?

Bacteria in dental plaque use sugars from food and drink to produce acids. Frequent sugary snacks or drinks give teeth repeated acid exposure and increase the risk of decay. Early decay may cause no pain, so waiting for sensitivity is not a reliable way to judge whether your teeth are healthy.

Acidic drinks and stomach acid from reflux or vomiting can also wear away enamel. This is dental erosion, which differs from tooth decay, although both can affect the same mouth. A dry mouth can make teeth more vulnerable because saliva helps protect them. Tell your dentist about persistent dryness, reflux or relevant medicines; do not stop prescribed medicine without advice.

What about white patches and sensitivity?

A white patch can be a sign of early mineral loss, but it is not a diagnosis on its own. Developmental changes, including fluorosis, can also affect enamel’s appearance. Similarly, sensitivity can have several causes, such as exposed root surfaces, decay, cracks or wear.

Book an examination if you notice a new mark, persistent sensitivity or a change in a tooth. Your dentist can identify the likely cause and explain whether prevention, monitoring or treatment is needed.

Daily care that supports remineralisation

Brush twice a day for about two minutes, including last thing at night. Adults should use toothpaste containing 1,350–1,500 ppm fluoride. Spit out afterwards without rinsing, so the fluoride stays on your teeth. Clean between teeth daily using an appropriate method, such as interdental brushes or floss.

For children, start brushing when the first tooth appears. Use a smear of toothpaste containing at least 1,000 ppm fluoride for children under three. From three to six, use a pea-sized amount containing 1,000–1,500 ppm; from seven, use 1,350–1,500 ppm. Supervise brushing and follow any individual advice from the dental team. Young children should not be given mouthwash as a substitute for brushing.

Keep sugary foods and drinks to mealtimes where possible and reduce frequent acidic drinks. If reflux or recurrent vomiting is contributing to wear, medical care for the underlying cause is part of protecting your teeth.

What can a dentist offer?

Depending on your risk, your dentist may recommend fluoride varnish or another preventive treatment. Stronger prescription toothpaste is appropriate for some patients, not a routine purchase for everyone. A cavity may need a filling even if you improve your home care.

Scaling removes hardened deposits and air polishing can remove some surface staining. These procedures do not rebuild missing enamel or automatically remove developmental white patches. Our listed scaling, air polishing and fluoride varnish service costs £170; see the dental fee page. This package is not necessary for everyone with early mineral loss: treatment should match the examination findings.

Avoid trying to polish away marks with abrasive powders or acidic home remedies. If you want whiter teeth, discuss professionally supervised whitening after any decay or unexplained sensitivity has been assessed.

Contact us if you have concerns about enamel changes or would like advice tailored to your teeth.