It is necessary to record the modifications made to a tooth or teeth such that a crown or bridge can accurately be made. The most traditional means of accomplishing this goal has been to place a gel-like material in the area of treatment and allow time for that to set and fabricate a plaster model.
Recent technology has made it possible to record all the necessary information for for crown fabrication with digital technology. This is essentially a digital camera which captures images from all sides of the tooth and gums. This is available for use with most types of crowns. It has the advantage of avoiding the taste and messy nature of the older techniques and can shorten the time needed for crown fabrication.