Abstract: The CAD / CAM technology is a new type of repair technology, mainly composed of a data acquisition system, computer aided design system, computer aided manufacturing system , with high efficiency, beautiful and accurate. This article aims to explain the CAD / CAM technology principles, steps and prognosis. The principle, procedure and prognosis of CAD / CAM technology are presented to increase the understanding of CAD / CAM technology.

Key words: computer aided design and computer aided manufacture, inlay, operation steps, porcelain fracture