A. Affects daily life 1. Recurrent inflammation, medically called pericoronitis of wisdom teeth. The gums are red, swollen, and painful to the touch, and the mouth grows with a bad odor sometimes. It is mainly for mandibular obstructed teeth. 2, often blocked teeth, and not easy to remove. Both maxillary and mandibular blocked teeth can have them, and many cases are accompanied by rotten teeth (decay). 3.Frequent grinding to the flesh of the mouth, mainly for the maxillary obstructive teeth, buccal tilt or elongation. 4.The second molar has pain, or the dental film suggests that the obstructed tooth is spoiling the front teeth. The obstructed tooth is spoiling the front teeth. II. Obstructed teeth with potential risk Many obstructed teeth do not erupt or only partially erupt without any clinical symptoms. This type of blocked tooth has more manifestations, but it is still recommended to be extracted. Common classifications are 1. Orthodontic eruption: but there is no occlusal relationship with the maxillary teeth. There is a risk of dental plugging and decay. 2. Anteriorly inclined obstructed: this type of teeth is more common. It has not been inflamed and has not yet caused damage to my teeth in front. But the long-term existence is still a security risk, which will cause pericoronitis of wisdom teeth, and the continued development will trip jaw facial gap infection. Especially women, physiological period or pregnancy caused by changes in hormone levels are more likely to induce. 3, completely buried obstruction: extraction reasons and the above similar. The orthodontist or joint doctor will recommend the extraction of the adolescent during the “orthodontic” period, and the orthodontist will recommend the extraction of the blocked tooth embryo to reduce its impact on the dentition. Patients with TMJ disorder may also be recommended to have their blocked teeth extracted to eliminate as much interference as possible. In total value, obstructed teeth should basically be extracted. Even if the orthodontically erupted tooth has a good occlusal relationship, it has only about 10% chewing efficiency. The value of its existence is not obvious, and it obviously does more harm than good.