Spots on teeth: Causes, treatment and prevention

Have you noticed white spots on your teeth and wondered what they mean? Don’t worry, you are not alone. In orthodontics we see these spots frequently, especially in people with fixed braces. Whether the cause is fluorosis, white spot lesions or something else – we explain how these discolorations develop and when you should take action. We also show you which treatments may help. Tooth discoloration, including white spots, is often related to your diet, your oral hygiene and professional treatments. Depending on the cause, different methods can help – from professional teeth cleaning to remineralization of the enamel to minimally invasive resin infiltration (Icon).

Quick overview – what helps against white spots, in the right order

1. Identify the cause: Spots that appear during or after fixed braces are almost always decalcified areas (white spots) – not dirt and not fluoride damage.
2. Remineralize fresh spots: In the first few months, fluoride varnish or a high-dose fluoride gel can harden the area again; bleaching the teeth, by contrast, often makes spots more noticeable.
3. Older, visible spots: Resin infiltration (Icon) fills the porous areas and makes the spot visually disappear – without drilling; a review of seven studies found clear improvements in appearance (Bourouni et al. 2021, see sources).
4. Deep defects: Microabrasion, filling, or veneer – this is decided by your dentist.
5. Prevention while wearing braces: Fluoride varnish every three months at the practice lowers the risk of new spots (Sonesson & Twetman 2023, see sources).

Do not try yourself: Lemon juice, baking soda, activated charcoal or abrasive toothpastes – they wear down enamel and make the problem worse.

Why do white spots develop on teeth?

Many people struggle with white spots, and they can have various causes. An accurate diagnosis is important in order to find the right treatment. Here are the most common reasons:

1. White spots caused by demineralization

White spots can be an early sign of tooth decay. They develop when the tooth surface is demineralized, usually because of too much acid in the mouth. You are especially at risk with fixed braces , because plaque and acids collect more easily in areas that are hard to reach. This is why good oral hygiene matters so much here.

White spots after fixed braces. If the spots appear exactly where the brackets were attached, they are almost always areas of decalcification: The area around the bonding sites is harder to clean, the enamel loses minerals, and the spot becomes dull and lighter in color. This is not yet a cavity, but a precursor to one.

What can still be done depends on the age and depth of the decalcification. Fresh, superficial spots can often be remineralized; older, deeper ones require other procedures, and some remain visible. A reliable assessment is not possible without examining the tooth.

If the spots appeared in you or your child after orthodontic treatment, we will take a look and tell you what can still be done in your case – even if the treatment did not take place in our practice. You can book an appointment online.

2. Fluorosis – too much fluoride?

Too much fluoride during tooth development can lead to fluorosis. It shows up as chalky, sometimes brownish spots on the teeth. Children are affected above all when toothpaste or drinking water contains a lot of fluoride. Often it is a purely cosmetic issue, but in the long term it can also weaken the teeth.

3. Diet as a cause

Acidic and sugary foods can attack the enamel and cause discoloration. With reflux, too, stomach acid can erode the enamel. Anyone who often drinks soft drinks or fruit juices should pay close attention to thorough dental care.

4. Medications and enamel hypoplasia

Some antibiotics, especially when taken at a young age, can cause spots on the teeth. Genetic factors such as enamel hypoplasia, in which the enamel does not form completely, can also cause discoloration. A dentist can help you here with various treatments such as professional teeth cleaning, bleaching or veneers to improve the appearance of your teeth.

Are white spots on teeth dangerous?

Whether white spots need to be treated depends on their cause. With fluorosis or medication-related spots there is usually no health risk. With white spots that point to tooth decay, it is important to act early in order to avoid damage.

How can white spots on teeth be removed?

There are several ways to reduce or remove white spots:

1. Professional dental cleaning

A professional dental cleaning can remove surface stains. This can be especially helpful with white spots if they are detected early.

2. Fluoride treatment for remineralization

Targeted fluoride treatments can strengthen the enamel and encourage new mineralization. This can stop white spots in their early stages and improve the color of the teeth.

3. Microabrasion – gentle removal of the spots

In microabrasion, a fine layer of the tooth surface is removed using a special paste. This improves the appearance, especially with white spots.

4. Resin infiltration (Icon)

With resin infiltration (Icon), a thin, free-flowing resin soaks into the porous white spot lesion, so that it visually blends in with the surrounding enamel – minimally invasive and without drilling. Particularly after fixed braces, it is considered a well-established method for permanently masking white spots.

5. Bleaching to even out the color

If spots affect the appearance of your teeth, bleaching can help to lighten the tooth color.

6. Veneers or fillings

For stubborn or deep discoloration, treatment with veneers or fillings can help. Your dentist offers a range of options here to improve the appearance of your teeth.

Can you remove white spots on teeth yourself?

The best way to prevent white spots is consistent oral hygiene:

• Thorough brushing with fluoride toothpaste

• Using dental floss to remove plaque

• Regular check-ups with your orthodontist, especially with fixed braces

• Cutting back on acidic and sugary foods

You should avoid home remedies such as lemon juice or baking soda, as they can damage the enamel. While many of these remedies seem natural and inexpensive, they also carry risks for your dental health.

Preventing white spots instead of treating them

White spots on the teeth are not always a reason to worry, but they should not be ignored. An early diagnosis and targeted measures help to avoid both visible and health-related problems.

Frequently asked questions about white spots on teeth

Why do white spots develop especially during treatment with fixed braces?

Plaque builds up more easily around the brackets and is harder to clean away. If these areas are not cleaned properly over a longer period, acids draw minerals out of the enamel – and decalcified white spots develop. Thorough oral hygiene during treatment is therefore the most important protection.

Are white spots on teeth dangerous?

Whether treatment is needed depends on the cause. Spots caused by fluorosis or medication are usually a purely cosmetic matter. White spots caused by demineralization, on the other hand, can be an early precursor of tooth decay and should be monitored by a dentist.

Do white spots go away on their own?

Early demineralization can often be stopped and partly remineralized with targeted fluoride application and good oral hygiene. As a rule, pronounced spots do not disappear completely on their own – in these cases dental measures help.

How can white spots be treated?

Depending on how pronounced they are, options include a professional dental cleaning, targeted fluoride application, so-called enamel infiltration (Icon) or, with stronger discoloration, bleaching or veneers. Which method is suitable depends on the cause and the depth of the spots and is decided individually.

How can I prevent white spots?

With thorough tooth brushing (including interdental brushes around brackets), fluoride toothpaste, a sugar-conscious diet and regular check-up and preventive care appointments. During treatment with braces, we support you closely so that demineralization can be detected early.