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CAD/CAM - international magazine of digital dentistry

technique _ monolithic posterior tooth restorations I 1.milling,sintering,glazing(efficient,cost-effective); 2. milling, sintering, individualization with ceramic characterization materials, glazing; 3. milling, individualization with infiltration liquids, sintering, glazing (highly aesthetic). Wechosetopursuethethirdmethod,whichwould be very cost-effective as a result of the benefits of- fered by the digital workflow. _Advanced zirconium oxide Zirconium oxide is more than twice as strong as other dental ceramics, and it exhibits excellent mechanicalproperties.Duetoitstranslucentcharac- teristics, the material has been fulfilling highly aes- theticrequirementsforquitesometimenow.Thema- terial is used to fabricate full-contour (monolithic) restorations and 20 frameworks that provide a base for individualized veneers. The zirconium oxide ma- terial Zenostar Zr Translucent shows excellent light transmission.Inthissystem,efficiencyteamsupwith aesthetics to offer impressive results. The wide range ofdiscs,thematchingstainsandthebrushinfiltration technique allow lifelike effects to be imparted to restorations in a relatively short time. _Preparation The following aspects were paramount in prepar- ing teeth 25, 35 and 26 for the ceramic restorations: avoidance of sharp edges and observation of a mini- mum wall thickness. The benefits of using zirconium oxide include the material’s high strength and as a consequence, the fact that very little tooth structure needs to be removed. The cavity in tooth 26 already showed extensive preparation. However, in order to properly anchor the new restoration, re-preparation was shown to be inevitable. The cavity had to be ex- tendedtowardsthebuccalaspect.Despitebeingvery Figs. 3 & 4_CAD/CAM images of the scanned wax-up and the PMMA-based long-term temporaries (Telio CAD for Zenotec). I 21CAD/CAM 2_2015 Fig. 3 Fig. 4

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