By performing the curved osteotomy rather than linear osteotomy which removes only the angular region of the mandible, it enables us to perform highly difficult surgery for Facial Contouring ensuring perfect blending with the whole jaw line Also we perform the cortical osteotomy in order to improve the front image of face, and if necessary with concurrent operation of such as isthmic fat removal, liposuction of subcutaneous fat, and Botox injection, etc, we doubles the patient satisfaction through reoperation when the patient did not have effectiveness by other surgical procedures.