Normal people have two sets of teeth from infancy to adulthood, and the teeth of the human body in early childhood are called milk teeth with 20 teeth. Distributed as the four quadrants of the mouth, the upper and lower left and right quadrants are 5, a total of 20, normal adult teeth have 32, also evenly distributed in four quadrants, respectively, each quadrant has about 8. However, there are special cases where the number of teeth decreases or the number of teeth increases, and there are adults who lack 1-2 wisdom teeth and the number decreases relatively. Some people will have more teeth, such as extra teeth near the incisors, and the relative number will increase. Roughly around 32 teeth, there will be more or less possible.