Obstructed wisdom teeth usually need to be extracted for the following reasons: First, the position and direction of wisdom teeth are not correct, and there is no normal occlusal relationship with the opposite teeth, so it cannot play the normal chewing function. Second, it is not only blocked by itself, but also may cause the adjacent teeth to decay or appear the performance of apical infection and periodontal disease. Some wisdom teeth may cause tooth-containing cysts, which is a cystic cavity around the crown of the wisdom tooth with cystic fluid inside. The cyst cavity will gradually increase in size and destroy the jawbone, causing many problems, and such wisdom teeth must be extracted. However, if the wisdom tooth is completely bone buried, that is, completely encapsulated in the jawbone, with a certain amount of bone separating it from the neighboring teeth, and there is no damage to the root or crown of the neighboring teeth, it can be observed first.