Wisdom teeth – the normal human permanent teeth are 32, 8 on the top and bottom, 8 on the left and right, of which the 8th tooth closest to the pharynx is medically known as the “third molar”, commonly known as wisdom teeth. So, what exactly is the need to remove the wisdom teeth? 1, repeated inflammation, some people’s crowns are partly or mostly covered by gums, forming deep blind pockets between the crowns, where food and bacteria are easily embedded and cannot be cleaned, resulting in inflammation of the gums, and if the inflammation is not controlled in time, it can cause complications such as gap infection. 2. Insufficient gap, not normal eruption of humans in the evolutionary process of evolution, due to the increasingly fine degree of food, dental arch development is also becoming smaller and smaller, so that the wisdom teeth eruption gap is insufficient, then its in the process of eruption is easy because of the lack of gap restrictions and gum swelling, pain. Obstructed wisdom teeth often cannot establish a normal occlusal relationship with the teeth of the opposite jaw, which can lead to symptoms such as pain in the temporomandibular joint in the long term. For wisdom teeth that cannot erupt normally, they should be extracted as soon as possible after the acute inflammation is controlled. 3.Invasion of neighboring teeth: Some patients’ wisdom teeth are not inflamed, but they are often embedded with food, causing caries of the second molar (i.e. the penultimate big tooth) and even causing pulp disease and periapical disease, etc. The number of non-functional wisdom teeth is 1-4, but not everyone will have all four wisdom teeth. If there is no corresponding wisdom tooth on the opposite side of the wisdom tooth, the wisdom tooth will slowly elongate and cause food embedment, thus causing a series of complications such as tooth decay of neighboring teeth and traumatic ulcers.