The timing of dental implantation generally includes the following cases: 1. Immediate implantation: that is, implantation immediately after tooth extraction or within 1 week after tooth extraction. The advantage of this case is that the extraction and implantation are performed at the same time, so that the patient avoids a second surgery and the patient’s pain is reduced. However, there are indications for immediate implantation, and not everyone can have an immediate implant. In general, the patient must have no obvious inflammation of the root, the bone plate on the labial side is intact, and the remaining bone amount can make the dental implant achieve a good initial stability. 3 months after the extraction, not only the soft tissues have healed, but also the bone tissues have grown to be more mature, which is the usual time for implantation. 4. Postponed implantation: About 4 months after the extraction, the implantation is postponed. It is also possible that the patient’s bone was not very good when the tooth was extracted, and the bit was preserved, and some GBR surgery was performed with more bone loss, so it is necessary to wait for a longer period of time after the tooth extraction before implantation.