Wisdom teeth are the teeth closest to the throat that grow out after the age of 18, and there are four wisdom teeth, two in each jaw. With the evolution of human beings, the size of the jaw bone is getting smaller and smaller, and there is often not enough space for all four wisdom teeth to grow out smoothly, resulting in some wisdom teeth not erupting or growing in abnormal positions and directions, which can bring many oral health hazards to people. Should wisdom teeth be removed or not? Wisdom teeth are the teeth closest to the throat that grow out after the age of 16, and there are four wisdom teeth, two in each jaw. With the evolution of human beings, the size of the jawbone is getting smaller and smaller, and there is often not enough space for all four wisdom teeth to grow out smoothly, resulting in some wisdom teeth not erupting or growing in abnormal positions and directions, which can bring many oral health hazards to people. First, if the wisdom teeth do not grow out completely, their crowns will be partially covered by the gums, thus forming pericoronal pockets. Pericoronal pockets can easily accumulate food debris and bacteria, which can lead to recurrent episodes of pericoronitis, resulting in toothache, restricted mouth opening, and difficulty eating. Secondly, if the wisdom tooth grows crooked, there will be an angle between it and the adjacent teeth, which can easily lead to food embedding, and over time, both the wisdom tooth and the adjacent teeth will be prone to tooth decay and even pulpitis. Thirdly, if the position and direction of the wisdom tooth growth is abnormal, it will also affect the biting relationship between the upper and lower teeth, which may cause the temporomandibular joint popping, painful mouth opening, night grinding, etc. In six cases, wisdom teeth must be removed What kind of wisdom teeth can be preserved and what kind of wisdom teeth must be removed? Wisdom teeth that can be retained: 1. The position and direction of wisdom tooth growth are normal. 2. There is no decay in the wisdom tooth and no history of inflammation and pain in the soft tissue around the crown of the wisdom tooth. 3. There is a pair of biting teeth. Wisdom teeth that must be extracted: 1. Decay: If the wisdom teeth have deep decay, especially those that need root canal treatment, it is always recommended to extract them. 2. Infringement of neighboring teeth: If there is not enough space for growth, the wisdom tooth will push against the neighboring teeth and continue to grow, which may lead to the inability to keep both teeth. 3. Insufficient space: If the wisdom teeth do not have enough room to grow, there will be more serious symptoms such as swollen gums and tooth pain during the growth of the wisdom teeth. 4, not easy to clean: If the wisdom teeth grow crooked, it will be more difficult to clean, and it is easy to appear cavities. 5.No pair of biting teeth: not everyone’s four wisdom teeth will grow out smoothly, if a wisdom tooth does not have another wisdom tooth opposite to it, it may affect the person’s biting relationship. 6, blocked teeth: this type of wisdom tooth, usually buried in the alveolar bone inside, when you feel pain, you have to remove it. Some people have wisdom teeth that should have been removed a long time ago, but they believe that as long as they do not cause pain, they do not need to be treated or removed. This view is not true. Once symptoms such as toothache appear, it is clear that the presence of wisdom teeth has caused irreversible damage to other teeth, and removing them at this time is more or less a mending of the fold. Some people are reluctant to go to the dentist because they are afraid of the pain of tooth extraction. In fact, under local anesthesia, the patient will not feel pain during the extraction. The wisdom teeth should be extracted when they have just erupted and the roots are not yet fully formed.