Generally 3 months after the extraction of teeth can be prosthetic restoration, at this time the healing of the extraction wound is basically complete, if the repair is too early may lead to alveolar bone resorption, if the repair is too late may lead to displacement of neighboring teeth and maxillary teeth, as follows. 1. Repair too early: Whether making fixed partial denture, removable partial denture or implant denture, it will stimulate the alveolar bone in the extraction area, which may lead to alveolar bone resorption and affect the healing of the extraction wound. 2. Repair too late: the adjacent teeth in the missing teeth area may be tilted toward the gap, and their maxillary teeth may elongate, resulting in early contact and jaw interference leading to occlusal trauma. 3. However, it should be noted that nowadays, a class of immediate implant technology has been developed, that is, it can be implanted directly after tooth extraction, but the selection of indications for this method is more stringent. It is recommended to go to the hospital, with the help of the doctor for professional targeted treatment.