Wisdom teeth, also known as risers, are the third molars of permanent teeth, which grow in the innermost part of the mouth and are the most late-growing type of teeth. 4 wisdom teeth all growing together means that the patient’s jawbone is well developed and the dental arch itself is fuller in order to have enough space for the growth of wisdom teeth, and 4 wisdom teeth all growing together is also conducive to the function of oral chewing, which can increase the efficiency of extra chewing and make food grinding more fine. With the development of human body, the jawbone development of many people nowadays is small compared with that of previous people, which leads to the inability of wisdom teeth to erupt normally and completely, and the ectopic blocked wisdom teeth may cause lesions of neighboring teeth, resulting in decay and loosening of neighboring teeth or even loss of teeth, which will lead to pain and even pericoronitis of wisdom teeth. If the wisdom tooth grows abnormally, has a large area of decay, or has obvious pain and affects the patient’s diet, it can be extracted under the guidance of the doctor. For wisdom teeth that can erupt normally, have normal orientation, establish correct occlusal relationship, and do not cause pain or inflammation, they do not need to be extracted.