With the significant increase in the elderly population and the gradual increase in the proportion of the population with edentulous jaws and tooth loss caused by periodontal disease, car accidents, etc., the number of patients requiring prosthetic restorations is increasing year by year. Dental implants can significantly improve the level and quality of restorative dental treatment and improve the quality of life of patients with missing teeth. Oral implant restoration has become the preferred method of restoring missing teeth worldwide, with about 5 million implants consumed worldwide in 2005. As the preferred restoration method for patients with missing teeth, dental implants have a series of features that are superior to other veneers and are gradually gaining popularity among patients. Compared with traditional dentures, it does not require the removal of healthy adjacent teeth, which maximizes the protection of the healthy adjacent teeth; no metal rings are needed, and the abutments on traditional removable dentures are less or even eliminated, which makes patients feel more beautiful and comfortable, and has good retention and stability, and patients can quickly adapt; the chewing effect is greatly improved than traditional removable dentures. The main reason for the increased chewing efficiency is that the bite force is directly transmitted and dispersed to the surrounding jawbone by the implant, so that it can take on a larger bite force. Such a denture is firm and strong in the mouth, and the patient not only feels comfortable, but also chews with significantly improved efficiency and ideal aesthetic results. Implant dentures are even known as the “third set of teeth” because they are very similar to natural teeth in terms of support, function, sensation, shape, and use. The following is a brief introduction to what dental implants are. When should dental implants be done after tooth extraction? Who is suitable for dental implants? How to protect the dental implant after the implant is done, etc. I. What is dental implant? Dental implant – implant denture is a dental implant that is surgically prepared in the alveolar bone of the missing tooth and then screwed into the implant (artificial tooth root); after the implant has healed in the bone for a period of time, a beautiful and natural metal porcelain crown or all-ceramic crown is attached to the artificial tooth root. The bond between the implant and the bone tissue is osseointegration, which was first defined by Branemark in 1977. Osseointegration refers to the direct contact between living bone and implant at the light microscope level and in different proportions. However, the most relevant definition of osseointegration is under Roberts in 1994, which refers to direct bone deposition on the implant surface, without fibrous connective tissue spacing between the implant and the supporting bone; clear on percussion due to direct conduction to the bone, without physiological movement and without movement when used for orthodontic support; and functionally equivalent to dental adhesions. Therefore, the movement of the implant denture is minimal when subjected to occlusal forces. After understanding what dental implants are, let’s talk about a question that many patients often ask, namely, what are the advantages of using this restoration method compared to the conventional fixed bridge restoration, since dental implants are so expensive. The difference between a single missing tooth restored by implant denture and a metal porcelain fixed bridge is as follows: 1, implant restoration does not need to grind out the tooth tissue of the neighboring teeth, while the porcelain fixed bridge must grind out part of the tooth tissue; 2, implant denture restoration will not increase the bite burden of the neighboring teeth, but can share the bite burden of the neighboring teeth; 3, implant denture is not carious, while the metal porcelain fixed bridge is fixed by the cement Therefore, with the passage of time, the cement will dissolve a small part and saliva and bacteria may enter the space formed by the dissolution of the cement, thus leading to caries of the neighboring teeth. When should I have dental implants? The timing of implantation can be divided into immediate implantation, early implantation, conventional implantation and delayed implantation. The advantages of immediate implantation are: reducing the number of surgeries, preventing the resorption of alveolar bone, and shortening the treatment time. Another advantage is that the natural shape of the gum tissue can be properly preserved, which facilitates the aesthetic effect of the gum portion after crown restoration. If the natural root does not match the morphology of the implant, or if there is a small amount of horizontal bone loss in the cervical area, or if the alveolar bone on the labial side is thin.