Improvement of projection and contour of the cheek can be achieved by the insertion of implants. These are specially designed malar implants placed beneath the skin and soft tissues placed above the malar or cheek prominence to enhance the projections and hence lift up the sagging skin.
The chin deformity can be corrected using a well-designed chin implant placed above the chin bone. It can also be corrected by cutting and repositioning the chin bone and fixing it in the correct position.
These will be rather complex surgeries done to re-position both the upper and lower jaws. It is called orthognathic surgery.