It is common to encounter patients who have just had their teeth extracted asking for a fixed denture restoration or patients who have been missing teeth for a very long time asking for a fixed denture restoration, which is not the right time for restoration. Fixed denture restoration is generally recommended after 3 months of tooth extraction, because after tooth extraction, the alveolar bone will form an extraction wound, and the bone healing time of the extraction wound is usually about 3 months, but the time is not absolute, if the patient has diabetes or other diseases, it may cause the healing time of the extraction wound to be prolonged, and the time for fixed denture restoration will be prolonged accordingly. If the tooth is missing for too long, the adjacent teeth on either side of the extraction wound may tilt toward the extraction area and the opposing teeth may elongate toward the extraction area, which may adversely affect the denture restoration or cause food impaction after the denture restoration. Patients generally need to go to the hospital for examination in about 3 months and work with the doctor to determine the best time for denture restoration. If the fixed denture restoration time is less than 3 months, the resorption of the alveolar bone has not reached a stable period, and premature restoration may lead to discomfort after the fixed denture restoration.