The link below is to a Glidewell Lab special discount offer for dentists submitting digital impressions. The ad notes the savings on models, shipping and trays. However there is an even bigger savings for both the labs and the dentists. Systems like iTero actually produce a more accurate impression with fewer mistakes than impression goo in a tray. There are a lot of reasons for this but whatever the reason the surveys show re-makes go from about 5% with goo down to about 0.5% with iTero.