Orthodontics is based on the physiological characteristics of the plasticity of the upper and lower jaws, the resistance of the dental bone, and the stability of the periodontal membrane internal environment, using various orthodontic devices to move the teeth within a certain period of time and adjust the coordination between the facial if the teeth and the muscles of the jaws and face, so as to achieve a balance of the occlusal relationship, the aesthetics of the jaws and face, and the stability of the masticatory function. Here the focus is on the common risks of the general orthodontic process: 1, 60% of patients need to be extracted orthodontic treatment, most of the extracted healthy teeth, bringing some trauma and confusion to the patient, but this extraction treatment usually does not affect physical health. 2, in the process of tooth movement and periodontal tissue reconstruction, patients subjectively feel discomfort and need a certain adaptation phase, in the later treatment process will also increase the difficulty of oral hygiene cleaning resulting in food residue deposits, the formation of gingivitis, gum recession, calculus, oral odor and even cause tooth decay. The impact on the oral mucosa, the initial contact with the oral device (foreign body), easy to form oral ulcers, the treatment of various operations may accidentally injure the oral mucosa, causing a certain amount of pain (are able to heal by themselves). 3. In the process of tooth movement, it always follows the rule of applying force – rebuilding – applying force again – rebuilding, which is usually accompanied by mild resorption of the tooth root, and this resorption will not affect the stability of the tooth. However, due to the existence of certain individual differences, root-specific resorption can cause individual teeth to loosen or fall out. 4. Any form of alteration of the dentofacial jaw relationship will affect the function of the temporomandibular joint, from disorder to stability, and may require the concerted consultation of a professional temporomandibular joint surgeon. The relatively long orthodontic treatment process runs through the weighing of pros and cons, the trade-off between pros and cons, and the observance of the principle that the benefits outweigh the disadvantages, with minor pain always present throughout the process.