If an eight-year-old child’s incisor is knocked out, it can be removed by observation, filling surgery, living pulp preservation surgery, or extraction. 1. Observation: If a baby tooth is knocked out, usually no special treatment is needed, pay attention to the disinfection of the wound, prevent infection, and permanent teeth will gradually erupt. 2. Filling: If the tooth is broken, resin filling can be used to repair the shape and maintain the gap. 3. Pulp preservation surgery: If the tooth injury is visible, small pulp leakage, short time of injury, you can directly cover the pulp surgery to preserve the living pulp; if the trauma leakage, tooth infection, you can take the pulp amputation. The pulp can not be saved viable root canal treatment. 4. Extraction: If only the root of the tooth remains, it can be extracted and the gap can be maintained, which will help restoration in adulthood. Eight-year-old children knocked out the incisor, need to go to the hospital in time for examination and treatment.