The movement of teeth during orthodontic treatment inevitably involves alterations to the teeth and their surrounding tissues. These changes, under normal circumstances, have no adverse consequences. However, the orthodontist should also remind the patient to cooperate so as not to affect the oral health and bring side effects. In the tissues around the neck of the tooth. Its shape can be remodeled with the movement of the teeth. In the treatment, if you do not pay attention to oral hygiene, it will be inflamed, and if it is not controlled in time, it will cause resorption of alveolar bone and gingival hyperplasia, which will affect the treatment effect. Patients with more serious inflammation can only temporarily stop moving their teeth and do orthodontic treatment after the inflammation is eliminated. Impact on tooth roots: When orthodontic treatment is performed, various reconstruction activities such as resorption and hyperplasia also occur on the surface of the tooth roots. Although there is a slight resorption of the root during the treatment, the root will return to normal with its own restorative ability after the treatment is completed, but the risk of root resorption will be increased if too much force is applied during the treatment. Teeth become loose: In normal treatment, due to the alveolar bone and periodontal membrane around the teeth for remodeling, the teeth will be loosened to a certain extent, which is a normal phenomenon. After the teeth are straightened to their normal position and stop moving, the body is able to stabilize the teeth through its own restorative ability, and the teeth will not become loose forever. During treatment, if you find that the teeth are too loose, you should pause the force and let them recover for a period of time before continuing to apply force. In short, orthodontic treatment, should be as far as possible to control the movement of the teeth in the normal physiological range, although the result is that the orthodontic treatment is longer, but can protect the health of oral tissues. At the same time, it is best to be treated by an orthodontic specialist, whose diagnosis, design and level of clinical operation are directly related to the effectiveness of the treatment. In addition, the patient’s cooperation and oral hygiene during the treatment will also have a certain impact on the efficacy of the treatment.