Teeth sometimes need to be extracted due to trauma, decay, fracture, periodontitis, etc., resulting in the loss of teeth or tooth rows. There are three main ways to restore missing teeth: removable denture restoration, fixed denture restoration, and dental implant restoration. Dental implants are as comfortable as natural teeth and have a success rate of over 95% in ten years, and are known as the third set of human teeth. The timing of dental implants can be divided into: immediate after tooth extraction, 6-8 weeks after tooth extraction, 3 months after tooth extraction, and 6 months after tooth extraction. The timing is generally determined by the patient’s general condition, the local hard and soft tissues of the missing teeth, the periodontal condition of the whole mouth, especially the health of the adjacent teeth, and the patient’s understanding and acceptance of dental implants.