After orthodontic treatment with braces, the patient’s bite force decreases, resulting in a reduction in chewing function, which leads to atrophy of the bite muscles in the cheeks and temporalis muscles at the temples as chewing activity decreases, resulting in a sunken appearance on both sides of the face. In addition, symptoms such as tooth sensitivity during orthodontic treatment make patients reluctant to eat solid food, mostly liquid or semi-liquid food, further depriving the chewing muscles of exercise and possibly leading to nutritional deficiency and fat loss, further aggravating the situation of sunken cheeks on both sides.