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22 I I feature _ interview In other words, everyone concentrates on what he or she does best. _Could you give us a specific example of how this division of labour functions? We use CEREC Connect for the fabrication of all-ceramic bridges using the new multilayer method. In this case, the framework and the veneer facing are milled out of different ceramic materials and then adhesively bonded. I begin by acquiring impressions of the initial situation with the aid of the CEREC Bluecam (Fig. 1). Based on this data, the software generates a virtual model, which I then edit on the monitor. In ad- dition, I enter all the important information for the DT, for example, the preparation margins. This is not an absolute ‘must’. However, as I have direct access to the patient and am familiar with his or her dental situation, I can provide valuable assistance to the DT. I then send the data to the dental laboratory and fill in an electronic order form (Fig. 2). The DT is notified via e-mail that a new order has been received. Based on my data, he then fabri- cates the restoration (Figs. 3 & 4). The occlusal surfaces and veneer facing are computed using the patient’s individual dentition and the patented biogeneric model. The bridge frame- work and veneer facing are milled out of ceramic blocks. Two to five days later, the finished frame- work and veneer facing arrive at my dental practice by special delivery. I check the fit in the patient’s mouth (Fig. 5), bond the components (Figs. 6 & 7) and then place the restoration (Figs. 8 & 9). Icanrelyonreceivingverygoodresults,asthe DT uses my original data. All potential sources of errorintheconventionalmethodareeliminated, for example the conversion from a negative to a positive model and possible damage during transit. All in all, the entire process runs more smoothly. _But surely the dentist requires a model in order to check the occlusion and articulation? Yes, that is correct, but this does not pose a problem. Via CEREC Connect, the dental labora- tory has the option of ordering a model based on the impression data (Fig. 10). Made of a polymer material, this stereolithographic (SLA) model is fabricated within three working days by Sirona’s infiniDent central production service. It fulfils exactly the same criteria as a conventional stone model. While waiting for the model to be deliv- ered, the DT can design the restoration frame- work and veneer facing. _HowdodentistsandDTsbenefitfromCEREC Connect? CEREC Connect speeds up workflow. Digital impression-takingeliminatesnumerousprocess- ing steps and simplifies collaboration between thedentistandDT.Eachhasaccesstothesameset of data. And each can exploit his special skills and expertise. In this regard, CEREC Connect fosters a productive working relationship between ex- perts. The patient does not have to suffer the discomfortofaconventionalimpressiontray,and the final result is less likely to have errors._ Editorial note: All images courtesy of Loos/Richter. Fig. 9_The contact check indicates that the bridge has been optimally integrated. Fig. 10_The DT can order a polymer (SLA) model from infiniDent. This model is based on the digital impression data. CAD/CAM 1_2011 Hermann Loos studied dentistry in Jena and Dresden and qualified as a dentist in 1980.He was employed in the town of Grüna in Germany until 1991,where he subsequently set up his own dental practice. As a stomatology specialist,he has used the CEREC system for the past ten years.He has reported on his experiences of all-ceramic CAD/CAM restorations at conferences in Germany and abroad and has published numerous scientific papers. CAD/CAM_about the interviewee Fig. 9 Fig. 10