Please activate JavaScript!
Please install Adobe Flash Player, click here for download
ePaper created 2015-09-09, 12:07:54 | version 1.38.0
I technique _ veneering options guide, after which an immediate provisional restora- tion was provided. Fixed implant-supported zirconia bridges (Nobel- Procera Implant Bridge Zirconia) were produced for the definitive restoration in order to ensure high comfort, stability and good aesthetics. In the man- dible, five implants were placed and restored with screw-retained, single tooth restorations and a screw-retained implant bridge (zirconia) (Figs. 8–13). Rationalebehindthechoice Theteamchosethiscombinationofzirconiaframe- works and veneering ceramic for a number of reasons. From extensive earlier experience, they knew that this optionwouldallowthemtoobtainanoptimalaesthetic result, achieving natural-looking colour and translu- cency in the individual dental restorations while else- wherepreservingsofttissuevolumeandarchitecture. With this combination of materials and tech- niques, they also knew that they would be using a highly biocompatible material to make a prosthetic restoration that would provide excellent integration and stability of the peri-implant tissues. The team also chose this combination in order to obtain an optimal aesthetic result in a fully customisable prosthetic solution; one that would be, at the same time, both simple and retrievable. Fromatechnicalpointofview,theteampointsout, ‘This choice has allowed us to maintain an excellent fit of the framework due to CAD/CAM technology and the high stability of zirconia during the firing of the veneering ceramic.’ Finally—and not least of all—they chose this com- bination of zirconia and veneering ceramics because of the NobelProcera Software features, which allow forfullycustomisedframeworks,designedtosupport the veneering materials for stable, long-term results. _Case 3 ProfessorAlessandroPozziandMasterDentalTech- niciansPaoloPagliaandAlbertoBonacaofRome,Italy, presentedacaseofthe62-year-oldfemalepatientwho hadbeenwearingaporcelain-fused-to-metalrestora- tion in the upper jaw since the late 1980s. She pre- sented with a failing dentition in both the maxilla and mandibleandamoderateboneresorptionpattern. After some discussion, it became clear that she was looking for full mouth rehabilitation and re- quested a minimally invasive approach that would _Case 3 (Images courtesy of Prof. Alessandro Pozzi.) Fig. 14_The high smile line of the patient doesn’t hide the porcelain fused-to-metal (PFM) restoration with vertical and horizontal over contouring, as well as the greyness and deformity of the soft tissue architecture that follows with the disappearance of the papilla. Fig. 15_The NobelProcera frameworks try-in. This shape design has been milled in order to ensure biomechanical strength and enhance the cementation of the single lithium disilicate crowns. The soft tissue/restorative interface has been modelled with a scallop pontic design intheanteriorzoneandwithamodified slope design in the posterior in order to allow for hygienic maintenance. Fig. 16_The lithium disilicate crowns, fabricated by the accurate and precise NobelProcera CAD/CAM workflow, are tried into the mouth at the pre-sintering Blue stage in order to assess the fit and check for proper occlusion. Fig. 17_For the upper jaw, the lithium disilicate single crowns are cemented onto the zirconia framework in the lab (with the exception of the units with the screw access holes, which are cemented directly in the mouth after screwing the restoration to the implants). 40 I CAD/CAM 3_2015 Fig. 16 Fig. 17 Fig. 14 Fig. 15