Loose incisors can be treated by occlusal adjustment, resting of the affected tooth, repositioning and fixation, and if necessary, apical induction plasty and root canal treatment. The roots of newly replaced incisors are not yet developed, and the periodontal support tissues are fragile, so when the teeth are knocked or traumatized, they are prone to loosening, shifting, and dislodging. Subluxation, partial subluxation, lateral displacement of teeth in traumatic injuries can all show symptoms of loosening of teeth, and can be treated accordingly for different situations. 1. Occlusal adjustment: when loose teeth and normal teeth form occlusal trauma, a small amount of grinding of the affected teeth or the use of full jaw pads to eliminate occlusal trauma. 2. Rest of the affected teeth: after trauma to the affected teeth, the periodontal tissues are in a state of inflammation with congestion and edema, so it is necessary to let the affected teeth rest in order to reduce the stimulation of the periodontal tissues and promote the healing of the periodontium. 3. Repositioning and fixation: Partial dislocation and lateral displacement of the affected teeth often occur in the alveolar fossa changes in position, need to be reset to the original position after the use of elastic fixation of the affected teeth to stabilize the teeth in the normal position, in order to facilitate periodontal membrane restoration and prevention of tooth cementation. 4. Apical induction molding and root canal therapy: after trauma to some young permanent teeth, pulp inflammation and necrosis may occur due to blood flow obstruction and insufficient blood supply, so the infected and necrotic pulp needs to be extracted, and apical induction molding induces the development of tooth roots, and when the development of the tooth roots is completed, complete root canal therapy is needed, and restorative treatment is needed after adulthood. After the treatment of dental trauma, regular checkups are needed for the doctor to observe the regression of the pulp, root resorption, etc., so that the lesions can be treated in a timely manner.