Wisdom teeth, commonly known as proximal teeth and wisdom teeth, are the last four third molars to erupt in the mouth, one on each side. Because wisdom teeth generally begin to erupt at the age of about 20, when the physical and mental development of people is close to maturity, it is seen as a symbol of “wisdom coming”, so it is called “wisdom teeth” and is the tooth closest to the throat. In the growth of wisdom teeth, individual differences, some people before 20 years old, some people 40, 50 years old to grow, some people do not grow all their lives, this is normal. Some people may have only one or two wisdom teeth, and some wisdom teeth may even stop growing halfway, which is called wisdom tooth blocking.