DENTAL CROWNS AND BRIDGES AND METHOD OF MAKING SAME

摘要

Dental prostheses and methods for making them are disclosed. In one embodiment, a method comprises a sequence of steps including milling a cavity in a block of a coping material, filling the cavity with a green ceramic material, milling a portion of the green ceramic material away to leave a layer of green ceramic material on an occlusal surface formed in the coping material, milling the underside of the block of coping material to form the coping with green ceramic material, and sintering the coping with green ceramic material to complete the prosthesis. The milling steps may be performed by a computer-controlled mill. The computer may execute a CAD-CAM program that includes data from a three dimensional model of a tooth that is to receive the prosthesis. The dental prosthesis may be a dental crown or a dental bridge.

主权项

1. A method of making a dental prosthesis, the method comprising
a) forming a first cavity in a first surface of a block of solid material, the first cavity having a bottom surface comprising a protrusion extending upwardly and shaped to correspond to an occlusal surface of the dental prosthesis; b) filling the first cavity with a green ceramic material; c) removing a first portion of the green ceramic material from the first cavity such that the remaining portion forms a layer of green ceramic material contiguous with the protrusion of the bottom surface of the first cavity and having a contour that corresponds to the shape of the protrusion; d) forming a second cavity in a second surface of the block of solid material, the second surface opposed to the first surface, the second cavity having an inner surface shaped to correspond to the surface of a tooth that is to receive the dental prosthesis and that corresponds to the protrusion of the bottom surface of the first cavity, thereby forming a coping made of the solid material and contiguous with the layer of green ceramic material and including the inner surface shaped to correspond to the surface of a tooth that is to receive the dental prosthesis; and e) sintering the coping and layer of green ceramic material to form the dental prosthesis.