1. A pair of movable dentures should be made for the missing teeth beforehand, and it is better to wear them for more than 1 month, so that chewing and aesthetics will not be affected during the period of several months from the first surgery to the second surgery (before the placement of implant denture). 2. If there is tooth extraction or bed surgery, you should wait for 3 months after the bone defect is recovered and the X-ray shows that the quality and shape of the alveolar bone is satisfactory before considering dental implants. 3. When doing dental implant surgery, you should ensure that you are in good health. General blood tests should be done before the surgery. For patients with mild hypertension, blood pressure should be restored to normal; women should avoid menstrual period. 4. Before the surgery, you should keep your mouth clean and do dental cleaning and cure oral inflammation and oral diseases beforehand. 5. Implant surgery is usually performed in an outpatient operating room, and you can go home to rest after the surgery. You can also be hospitalized, and you can take care of yourself during the hospitalization, and you do not need to be accompanied. 6. It is better to bring the photos of the previous dentures and the missing teeth for the reference of the prosthodontist, so that the implants can be more natural and realistic in terms of tooth alignment and color.