The human permanent dentition has a total of thirty-two teeth, of which the third molar located at the end of the dental arch generally does not grow until the age of 18 to 26 years old, because this is the age when the body tends to mature, logical thinking ability, so the third molar is called “wisdom teeth”, but itself is not related to our intelligence. During the evolutionary process, human habits have changed, and the choice of food has become more and more refined, and the chewing organ has also degenerated. As the jawbone degenerates more significantly than the teeth, the length of the jawbone is not coordinated with the required length of the teeth, and there is not enough space at the end of the dental arch for the wisdom teeth to grow smoothly, so the erupted wisdom teeth are often tilted forward, backward, outward or inward, especially in the lower jaw, and some wisdom teeth are even completely buried in the lower jaw. When the wisdom tooth is not fully erupted due to insufficient jawbone position, part of the crown is often covered by the gingival flap, forming a blind pocket where food residue can easily enter but not easily discharged, plus the humidity and temperature of the mouth is suitable, providing a good environment for bacteria to grow and reproduce. When the body’s resistance is strong, the harm caused by bacteria is not obvious. When the body’s resistance decreases, such as after working hard, sleep deprivation, cold and fever, bacteria will take advantage of the situation and cause local redness and swelling of the gums, discomfort and pain in the posterior region of the molar, or even spontaneous throbbing pain, radiating to the ear and temporal area, accompanied by ipsilateral lymph node enlargement. In severe cases, it can lead to dental closure, difficulty in eating and swallowing, and is accompanied by systemic symptoms such as fever, headache, peripheral discomfort, constipation, and increased white blood cells. If treatment is not complete, it can become chronic inflammation. At the same time, the blocked wisdom teeth are difficult to clean, easy to embed food, over time, it will cause decay of adjacent teeth, and in serious cases, it can produce pulpitis, painful, so that the adjacent teeth alveolar bone damage and premature loss of function.