Most human third molars erupt between the ages of 16 and 26 years old. The third molar is known as the wisdom tooth, also known as the wisdom tooth or wisdom tooth. The space it can obtain for eruption depends on the growth of the posterior segment of the dental arch. Due to the fact that human jawbone degeneration is greater than tooth degeneration, there is not enough space for the third molar to erupt, which prevents it from erupting and creates an impediment to eruption. It is mainly manifested in the mandibular third molar. More and more patients are coming to the hospital for treatment of wisdom tooth obstruction, which adds a lot of worries and pain to the patients. Do all wisdom teeth need to be removed? The following points can be considered: (1) repeated episodes of pericoronitis; (2) a tendency to form cysts or cysts have been formed; (3) root resorption and caries formation in neighboring teeth; (4) orthodontic treatment requires extraction; (5) orthodontic restoration of the preliminary preparation. Although wisdom teeth extraction is one of the common operations in dentistry, but after all, it is a kind of surgery, and some wisdom teeth extraction is difficult, long time trauma. Wisdom tooth extraction should be avoided in the following cases: (1) acute local infection, such as pericoronitis; (2) limited mouth opening; (3) poor general health of the patient, such as anemia, diabetes mellitus, severe heart disease, liver disease, kidney disease, etc.; (4) immunosuppression; (5) patients are concerned. If wisdom teeth suitable for extraction treatment are not extracted, they may be locally infected repeatedly and complicate osteomyelitis of the jaws, cysts of the jaws, and damage to neighboring teeth. Therefore, it is advisable to remove wisdom teeth that are suitable for extraction as soon as possible. Wisdom teeth should be extracted carefully in the following cases: (1) they have erupted normally, although they have no function, but they have no effect on the neighboring teeth and the surrounding tissues, and there is no disease or lesion in themselves; (2) the blocked wisdom teeth are deeply buried, and CT examination is required to assess the risk and complexity of the surgery; (3) the second molar of the jaw has lost its therapeutic value, and the question of whether or not the second and third molar are extracted at the same time has to be considered in the balance of probabilities; (4) the second molar is damaged, and there is little possibility of restoration, and the third molar has a long axle, and the third molar has a long shaft. (4) The second molar has been damaged, the possibility of repair is small, the third molar long axis is close to the second molar, and the third molar is well developed, orthodontic wisdom teeth can be considered to replace the second molar; (5) Wisdom teeth eruption is close to normal, there is no recurrent infection, but only distal and middle part of the gingival flap cover, gingival flap excision can be considered. The above personal opinion is for reference.