Anatomy
Enamel
Enamel is the hard, outermost layer of a tooth. It is the hardest substance in the human body, but unlike bone it cannot regrow once lost.
Enamel is roughly 96% mineral — mainly hydroxyapatite. Although extremely hard, it is brittle and can be eroded by acids from food, drinks, or stomach reflux.
Protecting your enamel
- Use a fluoride toothpaste — see our pick of the best enamel and gum repair toothpastes
- Avoid frequent sipping of acidic drinks (soda, citrus juice, wine)
- Wait at least 30 minutes after acidic foods before brushing
- Treat reflux and bruxism if present