Children who have fallen and loosened their teeth may have tooth concussion or tooth fracture, which will require jaw adjustment and fixation observation, root canal treatment or tooth extraction in the hospital, depending on the situation. 1. Tooth concussion. Teeth hit by external forces may damage the periodontal membrane, causing slight loosening of the teeth, generally for jaw adjustment and fixed observation of the teeth will gradually restore stability. 2. Tooth fracture. Tooth loosening may be the root tip or root fracture, clinically, generally fixed jaw observation, some teeth can recover on their own. Some teeth can recover on their own. If the tooth cannot recover and pulp inflammation occurs, root canal treatment is needed, and if the root neck and the gingival sulcus are in contact with each other, it is necessary to remove the upper part of the crown and then carry out root canal treatment. If the inflammation is severe after root canal treatment or if there is a longitudinal fracture of the root, it is recommended that the tooth be extracted. Children who fall and loose teeth, it is recommended to go to the hospital in time to avoid causing further damage to the dentin and periodontal tissues.