Jaw or mandible implants increase the width of the lower third of your face by the angles of your jaw. Much like the chin, a weak jaw can be thought of as one that is not well defined and distinct from the neck or one that slopes rather than angles from the ear to the chin. In some cases, both the chin and jaw can contribute to facial imbalance. As with chin implant placement, Dr. Monasebian places jaw implants through incisions inside the mouth so there is no visible scarring.