Why do people still have wisdom teeth at the age of 20?

In medicine, wisdom teeth are also called third molars. They are the eighth teeth from front to back. Wisdom teeth are the last permanent teeth to grow out of the thirty-two permanent teeth in humans. They are located at the back of the upper, lower, left, and right dental arches. Wisdom teeth are also called wisdom teeth because they are usually around the age of sixteen to twenty-four when they grow. The origin of wisdom teeth Wisdom teeth refer to the four third molars in the human oral cavity, the innermost, upper, lower, left and right sides of the alveolar bone. Because these 4 third molars began to erupt at the age of 20, when people’s physical and psychological development was close to maturity, so they were regarded as a symbol of “the arrival of wisdom”, so they were called “wisdom teeth” – wisdom teeth. In fact, from the point of view of modern medicine, wisdom teeth are inevitable in human evolution. As we all know, “use it and lose it” is a universal law in the theory of biological evolution. Wisdom teeth are an excellent example. In terms of the growth of wisdom teeth, there are great individual differences. Some people grow before the age of 20, some people only grow in their 40s and 50s, and some people do not grow in their entire lives. This is normal. Moreover, all four wisdom teeth are not necessarily full. Some people may only have 1 to 2 wisdom teeth, and some wisdom teeth may not grow even half way. This is called impacted wisdom teeth. The position of the wisdom teeth starts from the gap between the front teeth, and counts the number of teeth from the front teeth on one side. If there is an eighth tooth, it is a wisdom tooth.