This surgery has evolved in the last 20 years. Chin surgery was done mainly as an Orthognatic procedure, in which the boney chin button was moved forward. It was a hospital procedure and involved significant down-time and quite costly. Over the years this surgery has changed to be mainly an implant type of surgery. At first silastic implants were used, now however I almost solely use Medpor Implants. Medpor Polyethylene implants have a long history of successful use in trauma repair.