The names and positions of teeth are shown as follows:
1. Primary teeth
In infancy, human beings begin to have primary teeth when they are about 6 months old, and there are 2 normal primary teeth (1 pairs). From about 6 years old, primary teeth will fall off from front teeth and gradually be replaced with permanent teeth.
2. Permanent teeth
In the period of permanent teeth, adults generally have 28 (14 pairs) to 32 (16 pairs) teeth, of which the last four of the 32 teeth are wisdom teeth, and not all of them will grow out.
Extended data:
Classification
According to the morphological characteristics and functions of teeth, it can be divided into the following categories:
1. Incisors: located in the front of the mouth, with S * * * on the top, bottom, left and right. Its * * * feature is that the crown is shovel-shaped from the lip surface, wedge-shaped from the adjacent surface, with the thickest neck and gradually thinning to the cutting edge, becoming all ridges. The incisor is a single root.
2. fangs: located near the mouth corner, there are four * * * on the upper, lower, left and right sides, which support the lips to make them plump. It is characterized by a conical crown, a prominent cusp in the center of the cutting edge, and a single root, long and straight, which is the largest root.