Every surgery has its own set of inevitable accidents. Inadequate preparation, negligence and improper care can cause different accidents. At this time, how to prevent accidents, as a guarantee of safe care after dental implant surgery, has become a new research topic for the majority of dental implant surgeons. 1. Infection prevention Prevention method: routine use of antibiotics. For simple implant surgery, oral antibiotics can be given for prevention after surgery, while complex implant surgery requires intravenous application of antibiotics to prevent infection. In addition, routine postoperative 7-10 days should be timely removal of stitches, can prevent local infection. 2, implant trauma or wound dehiscence prevention prevention methods: caused by wound dehiscence is mostly post-operative impact injury or excessive force caused by bracing crack, so after surgery should pay special attention to avoid collision; in addition, try to avoid eating too hard food. 3.Oedema and ecchymosis prevention Prevention method: Different patients, based on their physique and different surgical procedures, have different reactions to the surgery, some patients have lighter reactions or no reactions, while some will have local edema and ecchymosis, which usually lasts about 3-5 days. 4. Gingivitis or gingival hyperplasia Prevention: When producing and processing implants, try to ensure that the abutments are as clean as possible. In addition, careful protection of the abutment surface during the surgical operation and patient self-care, as well as good oral hygiene care, can effectively avoid gingival inflammation or gingival hyperplasia. 5.Pain prevention Prevention methods: only slight hidden pain or discomfort, no need to take painkillers, but if the patient is sensitive or feels pain more strongly locally, painkillers can be applied appropriately. 6.Hemorrhage prevention Precaution: Do not brush your teeth and use water for 24 hours after surgery, because over-frequent rinsing can lead to gargling and bleeding.