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Tooth Troubles
Chalky white marks on a tooth. This page explains what they can be and what a dentist may do. It does not tell you which kind your child has — that needs an examination.
A white spot is a change in how the enamel surface reflects light, and it has more than one possible explanation. One of them is early decay: the AAPD’s definition of early childhood caries includes decayed surfaces whether or not a hole has formed, and the site’s What is a cavity? page covers the stages before a cavity is visible as a hole.
Others are not decay at all — marks formed while the tooth was developing, for example. They can look similar. Telling them apart is a clinical judgement and this page does not attempt it.
Sometimes a tooth has a chalky white patch. It does not always mean something is wrong, but it is worth showing the dentist so they can have a proper look.
This is the page where the temptation to self-diagnose is strongest, because white spots are easy to see and there is a great deal written about them. Resist it. The same mark can be early decay that may be arrestable, or a developmental difference needing nothing. The difference determines everything and it is not visible to a parent.
Kept general, because the distinctions matter and belong to an examination:
Only the first of those is active disease, and it is the one where finding it early widens the options. That is the reason to show a dentist rather than to watch it.
Three things worth knowing.
The AAPD states that fluoride inhibits demineralisation and enhances remineralisation of demineralised enamel. Damage found early has options that damage found late does not.
The AAPD’s definition of early childhood caries counts decayed surfaces whether or not cavitation has occurred. Waiting for a hole means waiting past the point where the easiest options existed.
Which is exactly why this page does not try to sort them. Some need action, some need only noting, and they can look alike.
An examination, and quite possibly X-rays, to establish whether the mark is active decay and whether anything lies beneath it.
Mention it at the next routine checkup if your child has no pain and the mark is not changing. Ring sooner if it is spreading, if the surface feels rough or chalky, if there is any sensitivity, or if it appeared recently.
This page does not tell you which of those applies, and it deliberately does not give you signs to grade. Photographs taken at home and dated are genuinely useful to bring, though.
Can a white spot be reversed? Sometimes, depending on what it is and how far it has gone — the AAPD states that fluoride inhibits demineralisation and enhances remineralisation of demineralised enamel. Whether that applies to your child’s mark is a question for the dentist, and it is a good reason to have it looked at sooner rather than watched for months.
It can be. The AAPD’s definition of early childhood caries includes decayed surfaces whether or not a hole has formed. It can also be several things that are not decay. An examination sorts it; a web page cannot.
No, and trying harder is not the answer. What can be done depends on what the mark is. Show your dentist rather than scrubbing.
Fluoride-related changes are one of the possibilities a dentist considers, alongside several others. It is a question for the appointment, where your child’s history can be taken into account. See Fluoride.
Cleaning is harder around appliances, and marks appearing there are worth raising promptly with whoever is managing the orthodontic treatment as well as your dentist.
Mention it rather than watch it. If the mark is active decay, the AAPD’s point about remineralisation means early is materially better than late. If it is not, you will have found that out.
Every clinical statement on this page comes from the American Academy of Pediatric Dentistry documents below.
This website is for education only and does not replace care from your dentist, physician, or emergency services.