Patent ID: 8909363
Filing Date: 2014-12-09
Classification: A61C,B29C,G05B,G06F,G16H

Abstract:
1. A method for manufacturing a dental prosthesis, comprising: (a) providing a coping adapted for implantation at a dental site, the coping having a corresponding external surface; (b) providing a three-dimensional (3D) virtual model of the dental prosthesis, the 3D virtual model comprising an outer virtual layer and an intermediate virtual layer having an internal virtual surface configured to fit the corresponding external surface of the coping; (c) generating computerized numerical control (CNC) instructions corresponding to the 3D virtual model; (d) producing a plurality of wax models comprising an outer layer wax model based on the outer virtual layer and an intermediate layer wax model based on the intermediate virtual layer, the plurality of wax models corresponding to the prosthesis in association with the coping and produced using material removal operations based on the CNC instructions; and (e) producing the dental prosthesis on the coping from the plurality of wax models, the dental prosthesis comprising a plurality of overlapping prosthesis layers, the plurality of overlapping prosthesis layers comprising an intermediate prosthesis layer corresponding to the intermediate layer wax model and overlapping the coping and an outer prosthesis layer corresponding to the outer layer wax model and overlapping the intermediate prosthesis layer, wherein the outer layer wax model is formed on the intermediate prosthesis layer in order to form the outer prosthesis layer.