In the process of tooth extraction, there is a possibility of bleeding, pain, tooth fracture, gum tear, fracture of alveolar bone, etc. After the operation, there is a possibility of infection causing dry socket, which will cause severe pain, rotten smell at the extracted tooth, and it is difficult to stop the pain with painkillers, and secondly, if the general condition is bad, it is easy to produce more than bleeding, fainting, shock and other diseases. If the tooth is intact, it is unnecessary to extract it. After extraction, except for the wisdom tooth, it needs to be restored later, and the cost of implant restoration will be higher; porcelain crown and bridge restoration needs to wear the neighboring teeth; and the movable denture may affect the beauty and comfort. Therefore, before extracting the teeth, you should choose a regular dentistry for examination and diagnosis, and try to keep the teeth if they can be treated, while the teeth that cannot be treated should be extracted in good condition of the whole body.