The total knee prostheses had reflected the x-ray in scanning process. We create the prosthesis from resin to eliminate the error from x-ray reflecting. The first is to create a silicone mold by mixing two types of liquid silicone and catalyst and then poured into the blocks with the prosthesis. After that unpacking the prosthesis out of the silicone mold and mixing two types of liquid resin and catalyst then poured into the mold. Unpack the resin model out of the silicone mold as shown in figure 3.3.