Effect of ground covering orthodontics on root: During orthodontics, the root surface also experienced the reconstruction activities of absorption and proliferation. After treatment, the root will return to normal by its own repair ability, but if the stress during treatment is too large, it will increase the risk of root absorption.

Effect of ground covering orthodontics on dental pulp: In the initial stage of treatment, there is a mild and temporary inflammatory reaction in dental pulp, which shows that the patient has pain or discomfort in the first few days of stress application.

Effect of orthodontic treatment on alveolar bone height: After orthodontic treatment, alveolar bone height will decrease slightly.