Accuracy of Digital Impressions Achieved from Five Different Digital Impression Systems

Dr. Duret first introduced the CAD/CAM concept to dentistry in 1973 in Lyon, France in his thesis entitled Empreinte Optique, which translates to Optical Impression. The concept of CAD/CAM systems was further developed by Dr. Mormann, a Swiss Dentist, and Mr. Brandestini, who was an electrical engineer. 8 CEREC was the first commercially available digital impression system for use in the field of dentistry. Over the last 10 years, systems like 3M Lava C.O.S., Cadent iTero, E4D Dentist, and 3Shape Trios have been introduced. To date, various CAD/CAM systems are now available for dental applications. Each employs a specific, distinct technique for making impressions [8].