Teeth start developing in the unborn baby. Good nutrition from the mother during pregnancy is important in tooth development. The mother's diet should have adequate amounts of calcium, phosphorus, vitamin C, and vitamin D.
You bite into an apple and then try to start talking to your friend about yesterday's math homework. Suddenly something feels funny — one of your baby teeth has fallen out! It's been loose forever, and now there it is, right in your hand.
Back to Healthy body. Teeth are vital to our overall health, helping us to bite and chew food. How much do you know about them?
These early teeth are known as deciduous teeth, primary teeth, milk teeth, and other colloquial names. As a whole, baby teeth are smaller and whiter than adult teeth. The full set will usually appear between two and three years old. Most children then begin to lose them around age six and have them all replaced by the time they are teens.
The Universal Numbering System also called the "American System", is a dental notation system for associating information to a specific tooth  used in the United States. Dental charts are normally arranged from the viewpoint of a dental practitioner facing a patient. The patient's right side appears on the left side of the chart, and the patient's left side appears on the right side of the chart.
At age six or seven, the first adult or permanent teeth come in. They are known as the "first molars," or the "six-year molars. They come in at the back of the mouth, behind the last baby or primary teeth.
Children usually start losing their baby teeth from around six years of age. From years, children have a mixture of adult and baby teeth. The baby molars are replaced around 12 years of age.
Teeth are made up of different layers — enamel, dentin, pulp, and cementum. Enamel, which is the hardest substance in the body, is on the outside of the tooth. The second layer is dentin, which is softer than enamel, and the deepest layer inside the tooth is pulp, which consists of nerves and blood vessels. Cementum is on the root of the tooth and is beneath the gums.
These can be divided down the midline mid-sagittal plane into left and right halves. Teeth are positioned in alveolar sockets, and connected to the bone by a suspensory periodontal ligament. In this article, we shall look at the structure of teethidentifying teeth, and primary vs permanent dentition. The primary dentition is composed of 20 teeth, with 10 in each arch.