What enamel is made of and what it does
Enamel is a mineral shell, made almost entirely of mineral rather than living tissue. It is thickest on the biting surfaces and thinner toward the gum line, and it covers only the crown. The root is covered by a different tissue called cementum.
Its job is to take the force of chewing and to shield the dentin and nerve beneath from heat, cold, acid and bacteria. Enamel is slightly translucent, so the colour you see in a tooth is partly the enamel and partly the yellower dentin showing through it. This is why teeth with thinner enamel can look more yellow.
Can enamel grow back?
No. Enamel is made by cells that are lost when the tooth comes through the gum, so once the surface is worn away or broken, the body cannot rebuild it. What can happen is remineralisation: in the very earliest stage of decay, minerals from saliva and fluoride can harden a softened, chalky patch before a hole forms.
That is the useful distinction. A white, chalky spot can sometimes be reversed with fluoride and better habits, while a hole cannot be, and needs a filling. Our guide on how to stop tooth decay explains what works at each stage.
What wears enamel down
Acid is the main cause, either from the diet or from the stomach. Frequent fizzy drinks, citrus, sweetened tea and pickles all soften the surface for a short time after each exposure. Acid reflux and repeated vomiting bring stomach acid into the mouth. Brushing straight after something acidic can scrub away softened enamel, so it is better to wait.
Grinding the teeth, hard toothbrushes with a heavy hand, and tobacco chewing add mechanical wear. Some people are also born with enamel that is thin, pitted or poorly formed, as in hypoplastic teeth. Loss from acid and wear is covered in our guide to tooth enamel erosion.
| Cause | What happens | What helps |
|---|---|---|
| Acidic food and drink | Surface softens and wears over time | Fewer sips and snacks, rinse with water, wait before brushing |
| Acid reflux or vomiting | Stomach acid coats the back of the teeth | Treat the cause with a doctor, rinse with water |
| Teeth grinding | Biting surfaces flatten and chip | Ask a dentist about a night guard |
| Hard brushing | Wear near the gum line | Soft brush, light pressure |
| Developmental defects | Enamel is thin or pitted from the start | Dental assessment and protective restoration |
Common causes of enamel loss and what limits each: general information.
Protecting the enamel you have
Brushing twice daily with a fluoride toothpaste is the single most useful habit, because fluoride is taken into the enamel surface and makes it more resistant to acid. Children whose enamel is still forming should use the right amount of paste for their age, as too much fluoride during development can mark the teeth, as our guide on dental fluorosis explains.
When enamel is lost, the dentin underneath is exposed and teeth become sensitive to cold and sweet things. Our page on sensitive teeth covers what to do. For where enamel sits in the whole tooth, see our guide to the types of teeth.
Common questions
Is enamel the hardest part of the body?
Yes, enamel is the hardest tissue in the human body. It is hard but also brittle, so it can chip or crack under sudden force, such as biting on a stone in rice or dal.
Does whitening toothpaste remove enamel?
Ordinary whitening toothpastes work mostly on surface stains and do not remove meaningful enamel when used normally. Very abrasive products or harsh scrubbing over time can wear the surface, so use a soft brush and moderate pressure.
Can damaged enamel be repaired?
Lost enamel cannot regrow, but a dentist can protect the tooth with bonding, a filling or a crown depending on how much is gone. Early chalky spots may be strengthened with fluoride.
What is the difference between enamel and dentin?
Enamel is the hard outer shell and has no nerve supply. Dentin is the softer, living layer underneath, and it is the layer that causes sensitivity when it is exposed.
About this page
This page is general information, not a diagnosis or a quotation. Prices are prevailing Lucknow market ranges. Your own treatment and cost are determined after an examination. For questions about your own case, call +91 83036 12717.