CAD-CAM ceramic inlays and onlays: a case report after three years in place
Article Abstract:
Currently, there are several techniques available for preparing computer-aided designed (CAD) and computer-aided manufactured (CAM) dental inlays and veneers. A case of a 32-year-old woman is presented who had all of her amalgam restorations replaced with Cerec CAD-CAM ceramic inlays. The Cerec system, marketed by Siemens, is the only commercially available system bringing CAD-CAM technology to tooth restoration. These inlays have been functioning for three years, and the patient has maintained excellent oral health. The Cerec system fabricates inlays, onlays and veneers. It consists of a mobile unit with a miniature three-dimensional intraoral video camera, a monitor, keyboard, and a computer that controls the three-axis diamond-coated milling device. The camera first records an optical impression of the tooth cavity. Using that impression and additional data, the system is capable of milling an inlay from a ceramic block within four to seven minutes. The inlay and enamel margins are acid etched, and the restoration is cemented. An advantage to this system is that no impressions of the cavity preparations are necessary. Also, since the restorations are cemented in place in one visit, no temporary restorations are needed. Fewer visits are required to complete CAD-CAM restoration compared with conventional inlay restoration. The disadvantages are the high initial cost, the need for intensive training to use the technique, and the time required to become accustomed to the system. Dentists have reported that they feel comfortable with the system after placing 50 to 100 ceramic restorations. (Consumer Summary produced by Reliance Medical Information, Inc.)
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1990
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Grinding precision and accuracy of fit of CEREC 2 CAD-CIM inlays
Article Abstract:
A new computer-assisted design and manufacturing unit may have better grinding precision and degree of accuracy of fit than the currently used model. Researchers compared the CEREC 1 unit, used to create dental restorations, with the new CEREC 2 unit. CEREC 2 was able to grind 2.4 times more precisely than CEREC 1 in preparing mesio-occlusodistal inlays. CEREC 2 had a better accuracy of fit with very low deviations than does CEREC 1. CEREC 2 may be used to create onlays, veneer laminates, and single full crowns.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 1997
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The evolution of the CEREC system
Article Abstract:
History and success of CEREC, a dental restoration product developed by Sirona Dental Systems GmbH (Germany), which gives instantaneous three-dimensional measurement of tooth preparation and ceramic dental restoration is presented.
Publication Name: Journal of the American Dental Association
Subject: Health
ISSN: 0002-8177
Year: 2006
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