A new method for generating ceramic restorations: a CAD-CAM system
Article Abstract:
A revolutionary new technique now available in dentistry is computer-aided design and computer-aided manufacturing (CAD-CAM). Various CAD-CAM systems have received attention in the literature, but one that has not been publicized widely is CEREC (ceramic reconstruction), which was developed in West Germany and designs and mills ceramic restorations electronically. A small, hand-held camera takes a picture of the prepared tooth and the image is displayed on the computer terminal screen. The computer designs the inlay or onlay to fit precisely into the space to be filled. A block of porcelain is then milled in stages according to the electronic model; the process of designing and milling the restoration takes only 10 to 15 minutes. A major advantage of CEREC is that the restoration can be completed in one appointment, since it is not necessary to take impressions or manufacture temporary prostheses. No laboratory assistance is needed; the clinician can perform the entire procedure alone or with the help of one assistant. The restorations that can be constructed are inlays, onlays and veneers, including multisurface restorations with occlusal cusp replacement. The unit that houses the computer screen and milling equipment is the size of a tabletop personal computer and rests on a stand with wheels. The CEREC CAD-CAM system is in use in West Germany and it should be available in the United States at the end of 1989. (Consumer Summary produced by Reliance Medical Information, Inc.)
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1989
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Evaluating CAD-CAM generated ceramic veneers
Article Abstract:
The CAD-CAM (computer-aided design/computer-aided manufacturing) technique may be an effective method for making ceramic veneers to fit the teeth of patients requiring restorative dentistry. Restorative dentistry is the replacement by artificial means of a missing, damaged or diseased tooth or teeth. A study compared the use of the CAD-CAM method to the refractory method for making ceramic veneers for 30 human maxillary central incisors. The ceramic veneers made using the CAD-CAM method were comparable to those made in the laboratory using the refractory method. The interfacial gap was approximately the same for CAD-CAM veneers and laboratory-processed veneers. Veneers made in the laboratory frequently needed contouring of facial surfaces. CAD-CAM veneers often required contouring of the internal surfaces of the veneer next to the prepared tooth.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1993
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Will ceramic restorations be challenged in the future?
Article Abstract:
Resin-based composite systems have been developed that have the advantages of ceramics but do not damage the surrounding teeth. In the past, resins had an unacceptable wear rate, but their wear resistance is improving.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 2001
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