Jawline Augmentation: Facial Masculinization Surgery Medically reviewed by Jennifer Richman on December 16, 2024. Understanding Jawline Augmentation A mandibular or jawline augmentation is a surgery that increases the size of the jawline, giving it a more defined and angular appearance. This is typically an outpatient procedure, which means that it is performed under general anesthesia and patients are usually sent home the same day after surgery, unless this procedure is combined with other facial or body procedures, which may require an overnight stay. Recovery involves rest, dietary changes, pain and inflammation care. The placement of jawline implants leaves no visible scars, though patients will need up to 12 months to …