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Types of Digital Impression Technology. There are two types of digital impression technology currently available for dentists to use. One type captures the images as digital photographs, providing dentists and dental laboratories with a series of images; the other type captures images as digital video. The images can be captured using lasers or digital scanning.
Impression plaster has been used as a wash material inside a custom tray made by first adapting softened tray compound in an aluminum tray to the edentulous ridge and then adding a thin mix of plaster to the compound tray.