CAD0110

40 I I industry report _ digital impression-taking of the antagonist. The wall thickness of the pro- jected ceramic framework is checked beforehand, as are the insertion paths of the abutment crowns. Afterdesigningtherestoration,thedatasetcan be transmitted to the milling unit or the practice’s laboratory, or sent via LAN or wireless LAN to the dental laboratory. In the rapid milling mode of the CEREC MC XL milling unit, a four-unit bridge can be produced in about 20 minutes. Composite resin blocksbyVITA(CAD-Temp)andMerz(artBlocTemp) can be used to fabricate the provisional restora- tion. The milling preview shows the size of the block required and the positioning of the restoration in the material—ideal when using ceramic blocks with integrated, density-determined enamel/ dentine colour progression (VITA TriLuxe, Ivoclar Multishade). _The virtual cast, online Using the CEREC Connect system, the digital data of the optical impression, even of the whole jaw, can be sent from CEREC AC to the dental lab- oratory. This enables the cast-free manufacture of the restoration. In the future, it will be possible to manufacture a physical cast using these data from a portal, for dental laboratory use. In this manner, all single-tooth restorations could be manufactured, such as inlays, onlays, partial crowns, veneers, crowns and temporaries. For crown-and-bridge frameworks of up to four units, any dental laboratory lacking a CEREC milling unit will in the future be able to access the Internet portal infiniDent to have a cast manufac- tured, which will serve as the starting point from which the laboratory itself can manufacture the framework. Thus, CEREC AC and CEREC Connect together offer the smallest possible initiation into the CEREC system, which can be expanded upon to any extent desired. Every inLab laboratory can make use of this option to accept work from impression-free practices and manufacture all- ceramic crowns and bridges using CAD/CAM technology. With the milling unit CEREC MC XL, the new CEREC 3D software and CEREC Connect, CEREC AC sets a new standard in restorative dental treat- ment. The system’s ease of operation allows a con- stant and time-saving workflow in the dental office. The progressive technology also offers new opportunitiesforhighlyefficientcooperationwith the dental laboratory. In addition, the modular nature of the CEREC system, its consistent devel- opment, and its total compatibility with all system components, including the labside system inLab, ensure complete treatment flexibility and sus- tainable investment security._ Fig. 5_Crown 24 after adhesive insertion. (Image: Götte) Fig. 6_CEREC AC showing Bluecam and Quadrant Scan. (Image: Sirona) CAD/CAM 1_2010 Dr Helmut Götte studied dentistry at the University of Munich were he graduated in 1993. Today,Dr Götte runs a fully digitalised,paperless dental office in Bickenbach, Germany.He has been using CEREC since 1996 and is a member of German Society of Computerized Dentistry. Dr Götte can be reached at helmut.goette@goette-online.de CAD/CAM_about the author Fig. 5 Fig. 6