Mandibular angle plastic surgery is a kind of facial contour reconstruction surgery, which is used to correct mandibular angle hypertrophy. Through surgery, the protruding parts of submandibular angle and mandibular angle edge are corrected, and the normal mandibular angle shape is restored, making the face petite.

Professor Zhang Xiaotian of Sheng Jiaxin's plastic surgery of mandibular angle refers to the principle of fine grinding and cutting after long curve osteotomy of mandibular angle, and the outer bone plate is curved to adjust the bone thickness (if the chin is too wide, it will cooperate with the T-shaped bone fracture of the chin). Therefore, compared with the traditional mandibular angle plastic surgery, Zhang Xiaotian's mandibular angle plastic surgery is more suitable for all types of mandibular angles, and the frontal and lateral effects can be maximized.