What are the dangers of understanding wisdom teeth? First, if the wisdom teeth do not grow out, the remaining tooth germ may degenerate and form oral tumors. When the space is insufficient, the embryo may absorb the root of the second molar in front of the tooth, which will reduce the strength and affect the function. Secondly, caries: The obstructed wisdom tooth can make the second molar decay. The crown of the wisdom tooth is on the neck of the front teeth, which forms a “retention area” (i.e. tooth gap) between the two teeth. The blocked wisdom teeth often cannot establish normal occlusal relationship with the opposite jaw teeth, which can lead to the symptoms of temporomandibular joint popping, painful mouth opening and night grinding for a long time, which has a great impact on the physical and mental health of young adults. Third, repeated episodes of pericoronitis: the surface of the wisdom tooth is covered by a gum flap, so that a gap is formed between the crown and the tooth, medically known as the blind pocket. The food debris people eat is most likely to be hidden inside, plus the humidity and moisture of the mouth is appropriate, providing a good environment for bacteria to grow and multiply. The food residue in the blind pocket is not easy to remove even if you brush your teeth and rinse your mouth. Under normal circumstances, the harm caused by the bacteria is not obvious, but in the cold, fatigue, resistance to lower, it will rise, take advantage of the opportunity to invade, which formed the wisdom teeth pericoronitis.