The shape of the face changes moderately in some people after orthodontic treatment. However, whether and to what extent orthodontics can change the shape of the face depends on the shape of the patient’s own face and the alignment of the teeth before orthodontics. Overall, orthodontic treatment has a very limited effect on the front of the face, but the side of the face will be more obvious than the front: if the patient’s mouth is protruding or the chin is sticking out due to long-term buck teeth or ground buns, the original protruding part of the side of the face will be gradually softened after effective orthodontic treatment; if the patient only has teeth irregularities, the side of the face will not change much. At the same time, due to the orthodontic process of tooth weakness and other problems, will also lead to the patient’s chewing ability to become weaker, appearing bite narrowing “braces face”. The main role of orthodontics is to align the teeth, improve the bite, reduce oral problems, improve chewing efficiency, and further improve oral health. In recent years, some organizations have exaggerated the aesthetic effect of orthodontics with concepts such as “cosmetic dentistry is comparable to plastic surgery”, which patients should identify.