Jig device for making a dental prothesis or pattern therefor

摘要

A jig device holding a work piece is used with a milling machine that cuts from the work piece a prosthesis having a surface essentially free of defects. The jig device is inserted repeatedly into the machine in the same predetermined location, even upon inverting the jig device. This maintains the spatial relationship between the jig device and milling so, at start up, they are always in the same exact spatial relationship. The milling machine partially cuts 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. The jig device is then removed from the machine, inverted and reinserted into the machine at the same predetermined location. A support material is placed in the cavity prior to reinserting the jig device. Upon reinserting the jig device, the machine precisely cuts through an opposed side of the work piece to form within the work piece a prosthesis having a surface essentially free of defects. The prosthesis is supported within the work piece by the support material. The prosthesis and support material are separated to complete our method.

主权项

1. The combination of a milling machine that mills from a work piece a dental prosthesis and a jig device that holds the work piece during milling in a manner that enables first and second opposed sides of the work piece to be milled,
said milling machine including a planar tabletop to which the jig device is mounted in a predetermined location so the jig device and milling machine are in an exact spatial relationship to enable the milling machine to precisely mill the dental prosthesis from the work piece first milling one side of the work piece and then the other side of the work piece, said jig device being configured to be inverted and returned to the same predetermined location to mill the second side of the work piece after milling the first side of the work piece, said jig device and milling machine including interactive elements that engage so that the jig device can be repeatedly inverted, positioning the jig device at the same predetermined location after each inverting of the jig device.