Many people do not know much about wisdom teeth. Wisdom teeth are the eighth tooth that erupts or has not yet erupted after the age of 16. As human beings evolved with smaller jawbones, there is often not enough jawbone space for wisdom teeth to erupt, resulting in abnormal position and orientation of wisdom teeth after eruption. Should wisdom teeth be extracted or not? Dental experts have summarized a lot of clinical experience to show that wisdom teeth not only have no chewing function, but also have a series of hazards or potential hazards, so early extraction is the best policy. Wisdom teeth must be removed for the following three main reasons: First, due to incomplete eruption, the gums on the back side cover part of the crown to form a pericoronal pocket, which accumulates food and bacteria and can cause frequent inflammation of local soft tissues and pain, even leading to restricted opening and difficulty in eating. Some people are reluctant to remove it after the inflammation, no more pain, can eat, and as a result, the symptoms of inflammation become more serious again. Secondly, most of the wisdom teeth are anteriorly inclined and obstructed, that is, they are at an angle of about 45 degrees on the second molar, and the two crowns form an angle and embed food, and after a long time, the second molar forms caries until pulpitis and severe pain. Another consequence is that the anteriorly tilted wisdom tooth continues to exert force on the second molar, which causes periodontitis and painful loosening and has to be extracted. Thirdly, although the eruption direction of some wisdom teeth is generally normal, but the contact point with the second molar is not normal, so as to embed food, and it is not easy to brush the gap between teeth when brushing, and it is very easy to cause the second molar caries and shorten its service life. Many people think that as long as the tooth is not painful, it does not need to be treated or extracted. This view is incorrect, because if it hurts, it shows that it has already caused irreversible damage to normal teeth and even the body, and it is difficult to recover the loss caused by wisdom teeth at this time. According to statistics, 50% of people have wisdom teeth, which erupt one after another around the age of 16. Since the roots of these teeth are not fully formed when they first erupt, they are easy to remove, and removing them at this time avoids causing damage to the second molar and the body, so it can be said that early removal is the best treatment option. Many people are aware of the danger of wisdom teeth and the reason why they must be extracted, but they are reluctant to visit the clinic for this tooth because they are afraid of pain. In fact, as long as local anesthesia is in effect, the extraction process is almost painless, which is the experience of many tooth extractors. However, after the wisdom tooth is removed, care must be taken to maintain it. How to do it? 1. After wisdom tooth extraction, the doctor will ask the patient to bite down on 1~2 cotton rolls, which serve to compress and stop bleeding and protect the wound. Generally the cotton strips can be spit out about 40 minutes after the extraction; 2. After wisdom tooth extraction, pay attention to protect the blood clot, do not rinse your mouth on the same day, do not chew food with the extraction side, do not lick the wound frequently, and do not suck and spit repeatedly so as not to destroy the blood clot due to the increase of negative pressure in the mouth. You can eat only two hours after the surgery, and the diet should be warm and cool, thin and soft for two days after the surgery. 3, antibiotics and painkillers should be taken after wisdom tooth extraction. If the trauma is large and the general condition is poor, some oral antibiotics and painkillers should be taken. 4. After tooth extraction, it usually does not affect work, but do not engage in heavy physical labor. It is better not to smoke and drink within one or two days after tooth extraction. As long as you pay attention to the above matters, the wound will heal smoothly after the wisdom tooth is extracted.