Wisdom teeth are, simply put, the outcasts of human evolution. When looking at the jaws of ancient humans and other primates, it is easy to see that their jaws were larger compared to those of modern humans, with wider buccolingual widths and longer proximal and distal mesial lengths. The jawbone has sufficient space, and the growth direction and occlusal relationship of wisdom teeth are generally normal, and there are few cases of wisdom teeth obstruction in modern humans, indicating that the space provided by the jawbone is directly related to the eruption status of wisdom teeth. Therefore, simply put, wisdom teeth are actually a biological trait that was abandoned during human evolution, and there are differences in the expression of this trait due to individual genetic differences. Generally speaking, wisdom teeth that are fully erupted, have normal morphology and position, have a normal adjacent relationship with the adjacent teeth, and have a normal occlusal relationship with the jaw wisdom teeth do not need to be extracted. There are several possible hazards associated with blocked wisdom teeth: 1. Pericoronitis due to insufficient eruption space, resulting in incomplete eruption of the wisdom tooth and ectopic or blocked, with the crown partially exposed to the gums and partially covered by the gums. This kind of wisdom tooth body and the gum between the formation of a narrow deep blind pocket, easy to embed and accumulate food debris and bacteria, when brushing teeth is difficult to clean to this part, plus the crown gum easy to chew food and damage, the formation of ulcers. When the systemic resistance decreases and bacterial virulence increases, it may cause inflammation of the tissues around the crown, resulting in obvious pain, inflammation and redness of the soft tissues around the crown, erosion of the gingival flap edge, and difficulty in opening the mouth. 2, causing adjacent tooth lesions Blocked wisdom teeth in the typical “show love, die fast” type, wisdom teeth because of the lack of eruption space, resulting in tilted obstruction, leaning on the next tooth, the next good neighboring teeth directly to the top of the bad. It is necessary to pay special attention to the fact that the adjacent tooth lesion has certain concealment, usually the situation is that the adjacent tooth may have been damaged, but the patient does not feel anything, which requires an oral X-ray to make an accurate diagnosis. The wisdom tooth eruption position is not correct, even if it does not damage the neighboring teeth, it may form a gap with the neighboring teeth and produce a local “hygiene dead corner”, food residue and bacteria accumulate in these parts, it is difficult to clean it by brushing teeth everyday, and it will easily cause caries in a long time. 4, no jaw biting teeth, resulting in wisdom teeth “savage growth” If there is no jaw teeth opposite to the wisdom teeth, sometimes the phenomenon of excessive eruption and elongation of wisdom teeth will occur. The wisdom teeth grow wild, excessive eruption, and even bite directly into the opposite gums when biting, causing bite pain, which in turn affects the normal bite. After reading the above, are there people who are glad that their wisdom teeth seem to be fully erupted, and that they have not formed blind pockets and are not on top of the other teeth, so they do not need to be extracted? From the x-ray, it looks like the two wisdom teeth have erupted in opposite jaws, and the position looks very accurate. However, after pulling them out, they look like this: they are rotten! Wisdom teeth are not painful and seem to grow neatly, why do doctors still suggest to pull them out? The picture above is a typical example: the two wisdom teeth seem to grow well, but in fact, because of the location, they cannot be cleaned well and lack of normal biting relationship, there are often food embedding and tooth decay, and when they have symptoms, they are usually very serious. Therefore, the safest way is to take at least one dental film, so that the dentist can help you make a correct judgment with professional eyes. Finally, a word about tooth extraction. Many people have a fear of tooth extraction, so they put off going to the dentist. In their imagination, tooth extraction is still a scene like this ….. Nowadays, we don’t use hammering and brutal construction anymore. We all advocate minimally invasive tooth extraction, with tooth extraction kinda, with precise anesthesia technology, the whole process of tooth extraction can be guaranteed to be painless. The specific principle is to apply local anesthesia first, then insert the jaw between the root and the alveolar bone with the groove of the jaw facing the root surface, protect the adjacent teeth with the left hand, hold the jaw with the right hand, take the alveolar bone as the fulcrum, use the leverage and rotation force to gradually loosen the tooth from the near-medium or far-medium part, and then remove the tooth with extraction forceps.