Damaged wisdom teeth can be extracted directly provided that there are no opposing teeth that form an occlusal relationship. If the opposing teeth are in the right position, after the removal of the damaged wisdom teeth, the opposing teeth can gradually elongate and create gaps with the neighboring teeth, resulting in caries after the formation of food impaction, and sometimes forming a joint interference, leading to temporomandibular dysfunction. Therefore, they are often extracted together. When the damage to wisdom teeth is not large, the decayed tissue can be removed to repair the cavity, and glass ionomer cementum, amalgam, etc. can be used to repair and fill the cavity to restore part of the chewing function. When wisdom teeth have deeper cavities and infected pulp, it is best to extract them due to the complexity and variability of the root canal system, which makes it difficult to perform root canal treatment because of the very narrow operating space. It is possible to remove the opposite jaw teeth at the same time as the wisdom teeth so as not to cause other lesions.