Dra. Cléo Salustiano In this article
SummaryThe main types of white spots and how to tell them apartHow to remove white spots on teeth: what the dentist can doFAQRead nextWhite Spots on Teeth: What They Can Be and How to Treat Them
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White spots on teeth can be early decay, fluorosis, marks left by braces or enamel hypomineralization. Early decay is usually dull and near the gum and can be stopped with fluoride and hygiene; fluorosis shows as symmetrical streaks and is not decay. Stable spots can be treated with microabrasion or resin infiltration, and deeper ones with composite or veneers. Do not use baking soda, lemon or sanding at home. Black and brown spots need an exam to rule out decay. In Mooca, Dr. Cléo Salustiano (CRO-SP 170844) sees patients every day, from 8 a.m. to 10 p.m.
A white spot on a tooth is almost always a change in the enamel, and the four most common causes are early decay (demineralization), fluorosis, marks left by orthodontic braces and enamel hypomineralization, a flaw that occurs while the tooth is still forming. Some spots can be reversed with fluoride and good hygiene; others are permanent and, when they bother you aesthetically, can be treated with microabrasion, resin infiltration, a composite filling or a veneer. Only an exam can tell them apart.
In clinical practice, the most common question is: "is this spot a cavity?". The answer depends on where it is, when it appeared and what the surface looks like. A dull, rough spot near the gum that appeared recently looks like early decay. Symmetrical spots on several teeth, present since the teeth came in, are usually developmental, such as fluorosis.
Dr. Cléo Salustiano (CRO-SP 170844), a dentist in Mooca, explains how to recognize each type of white spot, what works to treat it, what not to do at home and when spots of other colors (black, brown, yellow) deserve attention.
This article comes from Dr. Cléo Salustiano's dental office in Mooca, São Paulo (care in English, Portuguese and Spanish). See the teeth whitening page to learn how the treatment is done here and book your assessment.
The main types of white spots and how to tell them apart
Early decay (demineralization): this is the first stage of a cavity, before there is a hole. Acids produced by plaque bacteria remove minerals from the enamel, which loses its shine and looks chalky. It usually appears near the gum, between teeth and in areas the brush barely reaches. A dull, rough spot tends to be active; a smooth, shiny one may be inactive (arrested). At this stage, with the enamel surface still intact, the lesion can be stopped and partly remineralized with fluoride, hygiene and less sugar. The article tooth decay: what it is and how it starts explains this process.
Fluorosis: it happens when a child takes in too much fluoride while the permanent teeth are forming, for example by often swallowing toothpaste in the early years. The result is white streaks, dots or "clouds", usually symmetrical and on several teeth. Mild forms are barely visible; more intense forms can show yellowish or brownish areas. Fluorosis is not decay, is not contagious and does not get worse over time. That is why, in young children, the amount of toothpaste should follow the dentist's advice.
Spots after braces: during treatment with fixed braces, plaque builds up around the brackets. If hygiene does not keep up, the enamel demineralizes in that area and, when the braces come off, white marks appear in the shape of the bracket or as a crescent near the gum. These are early decay lesions. In the first months after removal, some of them tend to fade with hygiene and fluoride; whatever remains can be treated. If you still wear braces, see the article on how to clean teeth with braces.
Hypomineralization and developmental defects: in molar-incisor hypomineralization, the enamel of the first molars and incisors forms more porous. The spots are well defined, white, cream or yellowish, and may come with sensitivity and chipping. There are also isolated spots on a single permanent tooth, sometimes linked to a knock or infection in the baby tooth above it. These cases need follow-up because the enamel is weaker. One temporary cause is also worth mentioning: right after whitening, teeth dehydrate and white spots can stand out for a few days until the teeth rehydrate.
| Type | How it usually looks | Possible paths |
|---|---|---|
| Early decay | Dull, chalky spot near the gum or between teeth | Hygiene, fluoride and less sugar; monitor |
| Fluorosis | Symmetrical white streaks or clouds on several teeth since eruption | Nothing if mild; microabrasion or resin infiltration if it bothers you |
| Braces marks | Spots shaped like the bracket or a crescent near the gum | Fluoride and time; then infiltration, microabrasion or composite |
| Hypomineralization | Well-defined white, cream or yellowish spots, sometimes sensitive | Enamel protection, composite or veneer, case by case |
| After whitening | White spots more visible in the first days | Usually improves as the tooth rehydrates |
How to remove white spots on teeth: what the dentist can do
Treatment depends on the cause and depth. For early decay and recent spots after braces, the first step is to stop the lesion: better brushing and flossing, fluoride toothpaste, less sugar and, when indicated, in-office fluoride. For superficial, stable spots, such as mild fluorosis and old braces marks, there is microabrasion, which removes a very thin layer of stained enamel, and resin infiltration, which fills the enamel pores and reduces the contrast of the spot without drilling. Whitening can help even out the color in some cases, but on its own it does not always hide white spots.
When the spot is deep, when there is loss of tooth structure or when hypomineralization is more severe, the options become composite fillings or composite veneers, planned to restore shape and color naturally. The choice considers age, the size of the spot, the number of teeth involved and the patient's expectations. No single technique fits every case, and results vary from person to person.
What not to do at home: sand or scrape the spot, scrub with baking soda, lemon, vinegar or charcoal powder, or use abrasive strips and pastes without guidance. Acids and abrasives wear down the enamel and can make the spot more visible and the tooth more sensitive. In a young child, white spots near the gum on the upper teeth may be the start of baby bottle tooth decay and call for an assessment; simple cases are followed at the office and, when needed, the dentist refers to a pediatric dentist. Spots of other colors have different causes: black can be decay, darkened tartar, coffee or tobacco stains, or an old filling; brown is usually an external stain, arrested decay or more intense fluorosis; yellow usually comes from dentin showing through thinner enamel. The article on types of stains and whitening goes deeper.
This content is for information only and does not replace an exam. Consult a dentist to find out what is causing your spot before trying any treatment. In Mooca, Dr. Cléo Salustiano sees patients every day, from 8 a.m. to 10 p.m., including Sundays and holidays, with assessments for teeth whitening, composite veneers and general dentistry.
Is a white spot on a tooth a cavity?
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It can be, but not always. Early decay shows as a dull, chalky spot, usually near the gum or between teeth, and appears over time. Symmetrical spots present since the tooth came in are usually fluorosis or a developmental defect. The dentist tells them apart during the exam.
How do you remove white spots on teeth?
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It depends on the cause. Early decay is stopped with fluoride, hygiene and less sugar. Stable spots can be softened with microabrasion or resin infiltration. Deep spots or those with structure loss may need composite or veneers. Results vary from case to case.
Do white spots on teeth go away on their own?
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Some fade. Early decay spots and recent braces marks can become less visible with good hygiene and fluoride, and spots that appear right after whitening usually disappear within days. Fluorosis and hypomineralization do not go away on their own, but they usually do not get worse either.
Does whitening remove white spots?
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Not always. Whitening lightens the whole tooth and, in some cases, reduces the contrast of the spot. In others, the spot remains visible or stands out more in the first days. Whitening is often combined with microabrasion, resin infiltration or composite, depending on the assessment.
Why do I have white spots after braces?
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Because plaque built up around the brackets and removed minerals from the enamel. They are early decay lesions. With hygiene and fluoride, some fade in the first months; what remains can be treated with resin infiltration, microabrasion or composite.
Are white spots on a child's teeth a concern?
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They deserve an assessment. In babies and young children, white spots near the gum on the upper teeth can be the start of baby bottle tooth decay, which can be controlled if found early. The dentist advises on hygiene, fluoride and diet and, when needed, refers to a pediatric dentist.
Where can I have a tooth spot checked in Mooca?
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In Mooca, Dr. Cléo Salustiano (CRO-SP 170844) sees patients at Rua Hipódromo, 1141, near Bresser-Mooca station, Monday to Sunday, from 8 a.m. to 10 p.m., including holidays. Appointments via WhatsApp (11) 97409-7834, in Portuguese, English or Spanish.
