Teeth knocked out, you can take the following measures: First, if the tooth is completely dislocated, the tooth can be contained under the tongue, or use saline immersion, within two hours, the tooth will be placed in the alveolar fossa to reset, the production of dental arch splint ligature fixation, to avoid using the affected tooth to gnaw and eat hard objects, 3-4 months or so, the root of the tooth can be gradually restored to stable. Second, if the tooth loss time is more than two hours, the alveolar process does not fracture, immediate implant surgery can be carried out, in the alveolar socket into the implant, filled with bone powder and periosteum, 3-6 months after the formation of stable bone healing, the production of crowns connected to the implant. If the crown is fractured and the root of the tooth is stable, a one-time root canal treatment can be performed and a crown can be made.