Teeth are a remarkable part of the body, enabling us to savor food and… is that all?
**Fact 1** — 99% of the calcium in our bodies is stored in our teeth. Tooth enamel mainly consists of calcium phosphate, known as hydroxyapatite, the hardest substance in the human body—even tougher than bone. This durability shields teeth from oral acids. Under the right conditions, hydroxyapatite can even repair itself after acid exposure.
*Maintaining calcium levels throughout life is key to dental health. Pay close attention to your diet, especially calcium-rich foods like milk, yogurt, and cheese—top sources of this mineral. Other options include salmon, oysters, dried beans, and asparagus.*

**Fact 2** — Tooth enamel lasts about 50–60 years. This protective outer layer is the toughest tissue in the body, made up of 97% inorganic material. Once damaged, enamel cannot regenerate, leaving the tooth vulnerable. That’s why proper enamel care is a cornerstone of oral hygiene.
**Fact 3** — Dental plaque harbors 300 types of bacteria. While most are harmless, a small fraction can harm teeth or gums. Regular dental check-ups help manage plaque bacteria and catch issues early. See a dentist immediately if you notice gum bleeding during brushing—a possible sign of disease.

**Fact 4** — Wisdom teeth appear in 92% of adults, yet 25% never erupt. These teeth can emerge at any age; the oldest recorded case was a 94-year-old.
**Fact 5** — A knocked-out tooth can be reinserted into the gum—but act fast! It must be replanted within 5 minutes, and a dentist must see you within 30 minutes to save it.