a surgical procedure to change the shape of the chin bone by cutting the bone & changing its position. Genioplasty refers to surgery where the chin bone is actually cut as opposed to chin augmentation with an implant where the bone is not cut. After cutting the free chin fragment is kept attached to the muscle so that it remains live bone. The fragment can be advanced forward & then reattached to the jaw bone with wires, screws or plates to create a more prominent chin. If the chin needs to be lengthened in the vertical direction a wafer of material can be placed along the bone cut line to achieve this goal. If the chin is asymmetric a wedge of bone can be removed from one side or a wafer of material can be placed along half of the bone cut line to achieve symmetry.