Use of CAD/CAM system to fabricate dental prostheses. Part 1: CAD for a clinical crown restoration.

The development of a computer-aided design system for a clinical crown restoration is reported. Initially, the shape of the standard crown was deformed and adapted on the die depending on the shape of the margin. Then, the measured occlusal record data were taken in the computer graphics, and the adapted crown was adjusted with these data to obtain the centric occlusion. The occlusal data were replaced with data obtained using a functionally generated path record and the occlusal interferences eliminated. The ends of the adapted crown were connected with the margin. Thus, the entire crown was efficiently designed using the computer program developed.