There are many kinds of tooth extraction, and the common ones are as follows. 1 extraction of deciduous teeth is more common in erupted permanent teeth, but the deciduous teeth still do not fall off, resulting in displacement of permanent teeth. At this time, deciduous teeth should be pulled out in time to leave a normal growth position for permanent teeth. Because the root of deciduous teeth has been absorbed, it is almost painless to pull out deciduous teeth, and only a small amount of local anesthetic ointment for children or a small amount of imported anesthetic can be used to pull out teeth. Third-degree loose tooth extraction is more common in teeth with alveolar bone absorption and root exposure caused by severe periodontal disease. This kind of tooth is more common in the elderly. Lidocaine is usually used to anesthetize the corresponding position, and the anesthetic effect will be achieved in one to two hours after tooth extraction. After anesthesia, mild pain is normal. 3 wisdom teeth extraction wisdom teeth are supernumerary teeth, because they erupt late, mostly after 16 years old. At this time, there is no eruption position of wisdom teeth in the mouth, which is easy to cause various inflammations in the mouth. The most common is pericoronitis of wisdom teeth. Removal after anti-inflammation is the most thorough method, and lidocaine is also used as anesthetic. After anesthesia, the patient will feel numb in the face, as shown above.