How many teeth are there? Where are they?

The names and positions of teeth are as follows:

1, deciduous teeth

In infancy, humans begin to grow deciduous teeth at about 6 months. 20 normal deciduous teeth (10 pairs). From about 6 years old, deciduous teeth will begin to fall off from the front teeth and gradually be replaced by permanent teeth.

2. permanent teeth

In the permanent period, adults generally have 28 (14 pairs) to 32 (16 pairs) teeth, of which the last four teeth are wisdom teeth, and not all of them will grow out.

Extended data:

classify

According to the morphological characteristics and functions of teeth, they can be divided into the following categories:

1, front teeth: located in the front of the mouth, with a total of S up, down, left and right. Their common feature is that the crown is shovel-shaped from the lip surface, wedge-shaped from the adjacent surface, the neck is thickest, and it gradually becomes thinner towards the cutting edge, becoming a full ridge. The front teeth are single.

2, fangs: located near the corner of the mouth, up, down, left and right, a total of 4, supporting the lips to make them plump. Its characteristic is that the crown is conical, and the center of the cutting edge has a prominent sharp point, which is single, long and straight, and is the largest root.