Patent ID: 8784021

Claim:
A method wherein a milling machine cuts a prosthesis from a two-sided work piece held in a jig device, said method comprising, in sequence, the steps of inserting the jig device holding the work piece into the milling machine at a predetermined location so the jig device and milling machine are in an exact spatial relationship to enable the milling machine to precisely mill from the work piece a prosthesis having a surface essentially free of defects, partially milling through a first side of the work piece to form in the work piece a cavity having a surface part corresponding to at least a portion of the prosthesis being made removing the jig device from the milling machine and filling the cavity at least partially with a support material, presenting to the milling machine a second side of the work piece by inverting the jig device and reinserting the inverted jig device into the machine at said predetermined location, milling the work piece from said second side to form said prosthesis with a surface essentially free of defects, said prosthesis being supported within the work piece by the support material, and separating the prosthesis from the work piece, where the jig device and milling machine have interactive elements that enable the jig device to be repeatedly inserted, removed and inverted, and then reinserted into the milling machine at the same predetermined location with each insertion, or reinsertion after inverting, so the jig device and milling machine are always in the same exact spatial relationship to enable the cutting tool to precisely cut from the work piece a prosthesis having a surface essentially free of defects.