Implant surgery can be divided into immediate and delayed implant surgery according to the length of time after tooth loss. The treatment and restoration of artificial dental implants is roughly divided into three stages. 1. Pre-operative examination, implant plan design and pre-operative treatment, such as extraction of particularly loose teeth and root remnants, filling of teeth, treatment of periodontal disease and removal of bad dentures, adjustment and correction of bad occlusal relationship, etc. The time required for this stage varies depending on the situation of each individual. 2. Implant surgery stage: The implant is surgically placed in the bone by the surgeon according to the preoperative design, which is less reactive after surgery. It takes about 10-30 minutes to place an implant. Patients with suitable conditions can have a temporary restoration and immediate weight-bearing. 3. From 6 weeks after surgery, the permanent crown or denture is replaced or fitted. Permanent crowns are made of porcelain. They are of excellent texture, realistic color, comfortable and beautiful, and can restore the appearance and function of missing teeth to the maximum.