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I 21 clinical report _ crowns I CAD/CAM 2_2010 _Step I: Electronic axiography and lateral X-rays Computer analysis of jaw movements with electronicaxiographyisusefulfordeterminingthe jointparameters(Fig.1).Usingmechanicaltracing, axiography enables the collection of data on a patient’s TMJ, such as curve and inclination of the condylar path, mouth opening, Bennett and sagittal angles, mandibular protrusion and course of the mediotrusive tracks. Lateral X-rays provide data on movement by including the condylar tracks (Figs. 2a & b). _Step II: Slavicek analysis3 We used CADIAX (Gamma Dental) to analyse the X-rays in detail (Fig. 3). Here, the distances, spaces and tooth relations are of considerable im- portance. The vertical dimension and the special positionoftheocclusalplane,theSpee’scurveand the various occlusal tables of the laterals were determined. In the lateral X-ray, we paid particular attention to the occlusion tables of the molars, especially tooth #6. _Step III: Partial wax-up A partial wax-up of the individual occlusal surface was modelled on the master casts with respect to the TMJ angles and occlusal pattern of sequential functional guidance occlusion with caninedominance (Figs. 4 & 5).4–6 _Step IV: Scanning The partial wax-up was scanned and combined with the virtual images of the teeth stumps and virtualrestorationsfromtheCERECsoftwaredata- base. Thus, we were able to easily control the form, cusp position and inclination of the teeth with re- spect to individual TMJ movement characteristics andpeculiaritiesofthefacialskeleton.Weusedthe diagnostic display with display options for virtual modelling using CEREC software (Fig. 6). _Step V: Milling The temporary restorations were traditionally milled (Fig. 7). _Conclusion The method of real-virtual modelling described in this article enables us to guide the anatomical form of restorations using wax reference points with respect to the dynamic TMJ parameters of the patient. The method is a combination of a partial wax-up in the articulator and virtual computer modelling. With CEREC software, we are able to create temporary restorations with respect to in- dividual jaw movements._ Editorial note: A complete list of references is available fromthepublisher. Fig. 6_Step-by-step virtual modelling in CEREC software. Fig. 7_Temporary restorations after cementation. Dr Mikhail Antonik,Dr Mikhail Murashov and Dr Natalya Muraviova from the Moscow State University of Medicine and Dentistry in Russia can be contacted at mmurashov@yahoo.com. CAD/CAM_about the authors Fig. 6 Fig. 7