Recessed chin/ jaw line, can a genioplasty correct by 15-20mm ? (photos)

I was recommend plastic implants but after further research I believe a plastic implant will not be sufficient ! I did a measurement and have pictures of current position and where I would hope to get it if not further out or more protruded . By my recordings ( which I am not sure are very accurate ) my jaw would need to be brought out in the region of 15-20mm ! Can this be done by genioplasty or what other process would achieve the result wanted ? Any answers would be greatly appreciated !