How is mandibular angle hypertrophy formed? This is often related to teenagers eating too much snacks and chewing gum during their physical development, or it may be caused by grinding their teeth at night. These make the levator muscle (masseter muscle, medial pterygoid muscle, etc. Excessive exercise stimulates the development of muscles and bones in the mandibular angle area, and finally presents "square face deformity". Therefore, it can be considered that there are three reasons for mandibular angle hypertrophy. 1 mandibular angle bone hypertrophy

2. The masseter muscle overgrowth protrudes from both cheeks. Specific to each patient, the impact of the two reasons may be different, which may be that the bones are dominant or the muscles are dominant. But from the clinical experience, the two are often accompanied at the same time.

Some patients are caused by heredity, and their parents or relatives often have mandibular angle hypertrophy. Maxillary angle hypertrophy, mostly accompanied by masseter muscle hypertrophy, the patient's face is wider. Most of them are trapezoidal, and the outline of male mandibular angle is seen from the side. In cosmetic plastic surgery, there are more people who require face-lifting and mandibular angle plastic surgery.