cosmetic dentistry_ beauty & science

32 I I industry report _ CLEARFIL ESTHETIC CEMENT the silane primer was dried with a mild, oil-free airflow. Fig. 42_The teeth were polished with pumice before insertion of the bridge. A rubber dam with a largeopeningthatisolatedthepreparedandneigh- bouring teeth was used. Fig. 43_Applicationoftheself-etchingCLEARFIL ED PRIMER II to the preparation surfaces of the teeth. The primer was dried with compressed air until the surfaces were shiny. Fig. 44_Immediately after treating the restora- tionandtoothsurfaces,thebridgewasinsertedwith CLEARFIL ESTHETIC CEMENT. Fig. 45_After initial curing of the cement for a fewseconds,thecementwasremovedwithaprobe. Fig. 46_A bridge needle and floss were used to remove the excess cement underneath the pontic. Fig. 47_Final light-curing of the cement at all sites for 60 seconds. Figs. 48–50_Patient with the cemented bridge. _CLEARFIL ESTHETIC CEMENT for non-etchable ceramic crowns and bridges Fig. 51_Treatment planning for a strong three- unit zirconia bridge with abutment crowns on the second premolar and second molar. Fig. 52_Preparation of the teeth with a rubber dam in place, using a partial coverage design with supra-gingival shoulder margins. Fig. 53_The anatomy of the existing occlusal surfaces and a pontic section were contoured and duplicatedinthemock-upforthebridge.Afterthat, the composite resin temporary bridge was used for the scanning procedure. The design of the three- unitanatomicbridgebeforethemillingprocedureis shown. Fig. 54_After the CAD/CAM procedure, the zirconia bridge was heat-treated to full density, followed by a minor occlusal cut-back and veneer- ing with zirconia liner, deep dentine, stains and glaze. Fig. 55_Owing to its microstructure, zirconia is very dense and inert. Therefore, it cannot be HF etched or blasted with aluminium oxide particles. The inner surfaces of the abutment crowns were cleaned with K-etchant gel (40 % phosphoric acid; Kuraray Medical Inc.). Fig. 56_SilanetreatmentbyapplyingtheCLEARFIL CERAMICPRIMERtotheinnersurfacesoftheabut- ment crowns. Fig. 58_Treatment of the preparation surface of the premolar using the CLEARFIL ED PRIMER II Liquids A and B. Fig. 58_The mixed pastes of the CLEARFIL ESTHETIC CEMENT system were syringed into the abutment crown. Fig. 59_Placement of the bridge and light-cur- ing of the cement. Fig. 60_The veneered anatomic CAD/CAM zir- conia bridge after cementation._ _Reference 1. Denissen H, Dozic A, van Waas M, Feilzer A. Effects of 5 manipulative variables on the color of ceramics used for computer-generated restorations. Quintessence International, 2007;38: 401–8. cosmeticdentistry 4_2011 Kuraray Europe GmbH Industriepark Höchst Building F 821 65926 Frankfurt/Main Germany dental@kuraray.eu www.kuraray-dental.eu (EU) www.kuraraydental.com (USA) cosmeticdentistry _contact Fig. 57Fig. 55 Fig. 60 Fig. 56 Fig. 59Fig. 58 Fig. 54Fig. 53Fig. 52Fig. 51