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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.
The dental impression tray is filled with the viscous alginate impression material and placed over the teeth, one arch at a time. The alginate impression material sets after 30 to 60 seconds in the patientâs mouth. Cold water prolongs the setting time of alginate, while warm water shortens the set time considerably. Once the alginate impression material has set, it becomes solid.