Wisdom teeth refer to the four third molars on the innermost alveolar bone in the human mouth, one on each side. Because these four third molars begin to erupt at the age of about 20, when the physical and mental development of human beings is close to maturity, they are regarded as a symbol of the arrival of “wisdom” and are therefore called “wisdom teeth”, which are the teeth closest to the throat of the mouth. In the growth of wisdom teeth, individual differences, some people erupt before the age of 20, some people 40 or 50 years old, some people do not grow throughout their lives, this is normal. Some people may have only one or two wisdom teeth. Wisdom teeth grow in a special location, so it is difficult to do thorough cleaning, often causing dental caries, pulpitis, periodontitis; and wisdom teeth often due to the lack of eruption space, so that the wisdom teeth and its surrounding soft tissue between the formation of blind pockets, bacterial growth caused by wisdom teeth pericoronitis, and even interstitial infection, then the patient appeared swelling pain, cheek swelling, and even mouth opening restrictions; if there is no jaw teeth, wisdom teeth will over-eruption and elongation, and then affect the In the absence of the opposite jaw, the wisdom teeth will over-erupt and elongate, thus affecting the occlusal relationship and causing temporomandibular joint disease; wisdom teeth also have an important impact on the adjacent second molars. Since most wisdom teeth are anteriorly inclined and obstructed, they are placed on the second molar at an angle of about 45 degrees, thus forming a crown angle, which can easily embed food and lead to decay of the second molar and even pulpitis and periodontitis over time. Therefore, for the restless wisdom teeth, we should remove them as soon as possible.