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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.
As noted above, wax was the only impression material used in dentistry until the middle of the 19th century. The process of taking these impressions consisted of taking the warmed wax and forming it to the teeth and tissues. The wax then cooled and was carefully removed.