CEREC
CEREC ( Chairside Economical Restoration of Esthetic Ceramics, or CEramic REConstruction ) is a CAD / CAM method for reconstruction of dental restorations, which was developed in 1980 by W. Mormann and M. Brandestini at the University of Zurich. The method allows dentists, time -saving and efficient individual ceramic restorations directly at the treatment unit ( chairside ) in a meeting with computer assistance to construct itself, manufacture and use. The first patient applications were successfully carried out in 1985.
Model history
The CEREC method was developed in 1980 by Prof. Werner H. Mormann and Dr. Marco Brandestini at the University of Zurich. The first patient with CEREC treatment using ceramic VITABLOCS Mark I was in 1985. Siemens acquired in 1986 the license to market and further develop the CEREC method and brought 1987 CEREC 1 is the world's first CAD / CAM system in dentistry out. The indication area of the introduced in 1994 CEREC 2 system consisted of inlays, onlays, crowns and veneers. The sale of the Dental Division of Siemens AG in 1997, the company Sirona was formed. In 2000, the Windows -based CEREC 3 system was presented. During these first three model versions on the 2D technology -based, enabled the introduced in 2003 3D software the dentist to computer-aided design of virtual three-dimensional models. While ceramic crowns could only be secured adhesively to date, the new generation grinding MC XL allowed from 2007 through their increased precision to cement crowns also. 2009 Sirona has changed with the Bluecam recording technology on the short-wavelength blue light, thus, the precision could be sustainably increased compared to previous 3D camera. Use the Biogeneric can be since 2010, the occlusal surfaces of occlusal läierten or missing teeth faithfully and individually reconstructed. An interdisciplinary research group led by Prof. Dr. Albert Mehl of the University of Zurich and Prof. Dr. Volker Blanz of the University of Siegen found out that all a patient's teeth have individual characteristics that can be transferred from one to other teeth. In 2011 has been simplified with the software version 4.0, the user interface for the user through an intuitive menu. In addition, it has since been possible to edit multiple restorations in a work process (multiple restorations ). The latest development is the intraoral camera CEREC omnicam that came on the market in 2012 and a powder-free digital impression in natural colors possible.
Technology
By means of an intra-oral camera, an optical impression of the tooth to be restored is scanned, and a three-dimensional model is calculated. This can be displayed and edited on the monitor (computer aided manufacturing ). In order to take into account the physiological Okklusionsposition and thus avoid subsequent grinding, a corresponding antagonist may be included in the calculations. With the help of the copy - grinding process, the restoration is realized on the computer (usually an inlay ) milled from an industrially manufactured ceramic block of a three-axis grinding machine with diamond abrasive wheels.
Benefits
Through the continued development of the method could be achieved by the previously often necessary post-processing and time- demanding Okklusionsanpassungen are rare today. According to studies, the 10 - year survival rate of computerized milled CEREC inlays is not only significantly higher than that of gold inlays; it also exceeds that of custom-fabricated laboratory crafted ceramic inlays.