Dental caries, periodontal disease, trauma, etc. lead to tooth loss in many people. With the continuous maturation and improvement of implant technology, more and more people choose implant dentures to restore aesthetics and function. However, the most common clinical approach is to implant the implants 3 months after tooth extraction, and then after a healing period of 3-6 months, the porcelain teeth (or all-ceramic teeth) restoration. The whole treatment process is long, increasing the pain of patients missing teeth. Based on the considerations of shortening the treatment cycle and alleviating the patient’s pain, more and more suitable cases are being restored with immediate implant restorations. Immediate implantation refers to the simultaneous placement of implants after tooth extraction. A large number of animal experiments and clinical studies have confirmed that with proper case selection, reasonable restorative design, precise operation and selection of excellent implant systems, immediate implantation can achieve the same good healing results as traditional delayed implantation, and can achieve aesthetic results that are more difficult to achieve with delayed implantation. In some cases, immediate implantation is not suitable, often resulting in localized recession of the alveolar bone and gingiva, failure of the implant to achieve initial stabilization, or even failure of the implant. This can cause a lot of pain for the patient. Through the previous brief description, for patients who decide to use immediate implantation, the following questions need to be clarified: 1. Is it suitable for immediate implantation? Common cases suitable for immediate implantation include: tooth fracture due to trauma in the anterior region that cannot be retained; caries, apical and other lesions of the tooth that cannot be retained; severe periodontal disease that requires extraction; external root resorption; and sufficient bone underneath the extraction socket. For these cases need to be clear around no inflammation to ensure the safety of treatment. 2. Is the implant system chosen appropriate? Usually, immediate implantation requires the selection of a longer and wider implant system with excellent surface treatment according to the length and shape of the root and the amount of remaining bone. 3. Is the selected medical institution capable of performing immediate implantation? For the implementation of immediate implant treatment, it is necessary for the doctor to have rich clinical experience, strict grasp of the indications, and precise control of the surgical operation. Only if these conditions are met can the patient be provided with safe and reliable treatment.