“Chair side” CAD/CAM restoration differs from conventional dentistry in that the prosthesis is typically inserted or bonded the same day. Conventional prostheses, such as crowns, have temporaries placed from one to several weeks while a dental laboratory or in house dental lab produces the restoration. The patient returns later to have the temporaries removed and the laboratory-made crown cemented or bonded in place. An in-house CAD/CAM system enables the dentist to create a finished inlay in as little as an hour in some cases. CAD/CAM restorations are also more conservative in their preparation of the tooth. As bonding is more effective on tooth enamel than on the underlying dentin, care is taken not to remove the enamel layer. Designed to provide a complete digital workflow, in-office dental CAD/CAM systems include a digital impression system, 3D dental design software and a milling machine that function as a single system. Designed to provide a seamless workflow, these systems allow the dentist to provide patients with crowns, inlays, onlays and veneers in a single appointment.