The development of primary teeth begins while the baby is in the womb. At about 5 weeks' gestation, the first buds of primary teeth appear in the baby's jaws. At birth, the baby has a full set of 20 primary teeth 10 in the upper jaw, 10 in the lower jaw hidden under the gums. Primary teeth are also known as baby teeth, milk teeth or deciduous teeth. The names of the different types of teeth are:.

Do you know how many teeth you have? Teeth are an important part of both your bone structure and your digestion. The part of the tooth above the gumline is called the crown. And the part of the tooth below the gumline is called the root, which attaches the tooth to your jawbone. On average, babies first start getting new teeth around 6 months. A full set of baby teeth is 20 teeth: 10 on top and 10 on bottom.

All people have two sets of teeth. They are replaced with a permanent dentition , which starts to erupt around six years of age. There are 32 teeth in the permanent dentition.

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?