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ePaper created 2015-09-09, 12:07:54 | version 1.38.0
I industry report _ composite restorations (Schütz Dental) came into consideration. This mate- rial system consists of a framework made of Tizian Zirconia Reinforced Com- posite and the dialog Oc- clusal veneering composite (seethediscussionsection). A restoration made from these materials is slightly elastic, as well as abrasion resistant, and it mimics the physical properties of the natural tooth with flexibledentineandhardenamel.Chipping,asseen with hard zirconium dioxide with layered ceramic veneers, is minimised with restoration using Tizian Zirconia Reinforced Composite. Furthermore, the patient can be offered bionic restorationatamorefavourablepricethanafully ceramic restoration. This was relevant in the case presented in this article. _The initial steps: Implant placement, impression taking and scanning Implant placement in regions #15, 35 and 45 (IMPLA implant system, Schütz Dental) using corti- cal and extension drills pro- ceeded without problems, as was expected. All three implants were placed dur- ing the same appointment. After healing, conven- tional impressions were taken, frameworks were cast (Fig. 1) and gingival masks created (Fig. 2), and the necessary scans taken (Figs. 3 & 4a & b). _Virtual construction of abutments and finishing in zirconium dioxide Individual abutments provided a clean emer- gence profile and good hygiene capability with- out undercuts. Abutments made of zirconium dioxide provided the appropriate colour base for thedentalprosthesis.Owingtothesparsityofthe teeth in the molar region, tooth #15 was consid- ered as tooth #16 for the reconstruction (Fig. 5) and tooth #35 as tooth #36 (Fig. 6). This meas- ure allowed for terminal occlusion (Fig. 7) to be achieved. The CAD software (Tizian Creativ RT, Schütz Dental) matched all of the scans and made sug- gestions for three abutment models in the Tizian Creativ RT Abutment Designer module (Fig. 8). These were adjusted slightly and transferred to theCAMsoftwarefornesting(Fig.9a).Theframe- work was milled on a Tizian Cut 5 smart tabletop Figs. 12a & b_Scan of the plaster model with mounted adhesive titanium bases and abutments. Figs. 13a & b_Design suggestion for the three crowns. Fig. 14_Checking of the virtually modelled crowns. Fig. 15_Nesting of the three crowns. Fig. 16_Crowns milled from the Tizian Zirconia Reinforced Composite blank. 44 I CAD/CAM 3_2015 Fig. 15 Fig. 16 Fig. 14 Fig. 13a Fig. 13b Fig. 12a Fig. 12b