Digital impression is one of the latest innovation in dental technology. The University of Zurich introduced the original CEREC machine in 1980. It was the first to use digital impression technology to scan and view a patient's oral cavity. One of the great challenges in scanning an impression is the technology's is ability to see inside the voids that the teeth have created in the impression material. Many previous model scanners are unable to see inside these voids because the angle between the light source and the camera is too high. In order to view the clear impressions, the manufacturers decreased the angle between the light source and the camera, by giving them a better view inside those cavity. Due to their size, intraoral scanners have highly condensed optics and adapt quite well to scanning impressions.
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