If only a few teeth are missing, most of the teeth are healthy, and the height and width of the missing bone are sufficient, it is recommended to use dental implants for restoration. A porcelain or all-porcelain crown is placed on top. If most of the teeth are missing in the mouth and the alveolar bone has been resorbed to a low level, dental implants are usually not recommended and a removable denture can be used. If the local alveolar ridge is narrow and low, and the number of missing teeth is only 1-2, there is a problem of insufficient bone volume for implant restoration, and then bone augmentation and soft tissue augmentation can be chosen to provide sufficient soft tissue and bone tissue before the implant restoration.