Abstract
Accuracy and the shape of laminate veneers are significantly affected by the complicate technical procedures and the ability of the operator.A CAD/CAM production system for laminate veneer restoration was developed.Initially, a system which was composed of a laser displacement meter and a computer-controlled scanning machine was assembled to measure the three dimensional shape of stone teeth models automatically.To obtain a higher accuracy of measurement, several modifications were made, for instance, color of stone model was examined and gray was concluded to be the most suitable color, and further, the tracking measurement method to keep the distance between a displacement meter and the stone model constant was effective to measure a model with rugged surface accurately.By the present system developed, three dimensional shape measurement of a maxillar model was carried out, and high accuracy data were obtained.
