Generally, dental implants can only be done after the extraction has healed and flattened. The normal healing period of an extraction is 3 months, so dental implants can be done 3 months after the extraction has healed. Dental implants are a common way of restoring missing teeth. For missing teeth, if a tooth is missing, the previously used fixed restoration method requires grinding both sides of the tooth and making a porcelain bridge. In the case of dental implant restoration, it is not necessary to remove the good teeth on both sides, and a tooth can be directly implanted if one tooth is missing. This is why implant restoration is now the most common and effective way to restore missing teeth. For implant restoration, especially for patients with periodontitis, systematic periodontal treatment is necessary before implant restoration can be done, otherwise, the effect of the implant surgery will be affected, because in patients with periodontitis, there are a lot of bacteria and osteoclasts in the mouth, and the survival of implants in the mouth is osseointegration with the alveolar bone, and the success rate of implant osseointegration with the alveolar bone is low in patients with periodontitis. Therefore, the next step of implant restoration cannot be performed. In general, implant restoration can be done after three months after tooth extraction, and some patients can also do immediate implant restoration, that is, immediately after extraction or within a short period of time, depending on whether there is inflammation around the tooth and the environment in the mouth, and the patient’s own condition is required to ensure the success rate.