Hazards may include: 1, enamel demineralization and dental caries: this problem will occur if you do not pay attention to oral hygiene when it is not conducive to cleaning. 2. Periodontal tissue damage: tooth movement and periodontal tissue reconstruction need to follow certain biological forces, and incorrect orthodontic force may cause permanent damage to periodontal tissue.

3. Root resorption: Root resorption will occur to a certain extent, and the degree of absorption will often increase due to the distance that teeth need to move. But generally speaking, as long as the correct biological force is applied to teeth, the degree of root absorption will not affect the stability of teeth. 4. Ulcer. 5. Loose teeth: Under normal circumstances, each tooth has certain physiological activity to cushion the chewing pressure. 6, pulp reaction, etc.