Orthodontics will certainly change the shape of the face, but the change is limited. Its main manifestation is in the change of the lateral appearance, such as buck teeth, many times the upper lip is more convex, when the teeth are made to reach the new position through the inward retraction of the teeth, the lip is retracted, and when the appearance is observed again, the relationship between the nose, the lips and the lower jaw chin is very harmonious. It is true that the face part will become thinner after tooth extraction, because of the different bone forms that are formed. But most people do not become thinner, the teeth mainly change the sagittal direction, that is, the profile of the lateral appearance, and have very limited changes on the lateral side. The effect of wisdom tooth extraction on face thinning is very small. It is only after a comprehensive judgment based on the patient’s own maxillary morphology, mandibular morphology, as well as the tip of the patient’s eyebrows and nose, and the height of the lips, chin and cheekbones, that it can be pointed out that the patient’s orthodontic treatment will cause changes to his or her facial shape.