The recovery process after extraction is divided into three stages: first, the healing period of the wound after extraction, which lasts about 1 week. It is an inflammatory reaction, but it is also a protective mechanism, and the patient is likely to experience swelling and discomfort during this period. Secondly, the soft tissue healing period, during this period, many soft tissue repair cells will grow into the clot and gradually repair the extraction fossa in the trabecular area, during this period, the patient can use the extraction side for normal eating and chewing, but there will be obvious fossa on this side and food will be retained in it, but no infection will occur again. Thirdly, the period of alveolar bone repair, the period of alveolar bone repair actually starts from very early, but it takes about 3 months to repair slowly, and gradually new alveolar bone grows in the extraction sockets, and the extraction of the blocked teeth is divided into these 3 stages.