CAD0210

I 35 industry report _ Tizian CAD/CAM I CAD/CAM 2_2010 two implants in the area of the distal premolars were fixed at a 35° angle. Two attachments were placed on teeth #12 and 22, which enabled direct restoration. Many aspects had to be taken into consideration in or- der to achieve an enhanced stability, excellent shape adaptation and lifelike aesthetic results. We decided that the permanent construction was to be done using ZrO2 and Tizian CAD/CAM. We began by loading the model and the bite scans into the modelling software, which de- tected the preparation line of each unit individ- ually. Owing to the flexibility of the software, the preparation lines of the attachments and the 35° placed implants were easily detected. Addi- tionally, the process was fast and easy with an excellent accuracy of fit. Such level of precision canbeachievedmanuallyonlyatahightimecost. A unique type of insertion was performed in the next step in order to determine the best po- sition for the construction in the blank and to avoidundercuts,sonofurtheractionswouldhave to be done manually. After milling and sintering, thebridgeshowedanexcellentaccuracyoffit.We reduced the thickness of the cement gap and the crown border parameters, removed undercuts andreceivedperfectresults(demonstratedbythe green arrows over each crown in Figure 5). The software proceeded by automatically load- ing the anatomical shapes. A large variety of soft- ware tools provided excellent, lifelike results with regard to the natural tooth structure, morphology, Fig. 15 Fig. 12 Fig. 18 Fig. 21 Fig. 11Fig. 10 Fig. 14Fig. 13 Fig. 17Fig. 16 Fig. 20Fig. 19