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ePaper created 2017-11-09, 09:28:26 | version 1.38.0
overview | Ceramics are hard materials with very low elasticity. Even small variations in the homogeneity of the powder mix lead to a not inconsiderable weakening of the mate- rial and possibly to complete failure. Processes such as powder compression and sintering also need a great deal of knowledge and experience on the manufacturers’ be- half. Therefore, trust in the manufacturer on the part of the implantologist and very high product quality from the manufacturer are necessary. We have been using zirconium dioxide in our practice since 2004. Functional and aesthetic results, along with material safety, are ultimately what count in any dental practice. Results must be close to, meet or exceed the expectations of patients. We use Fürhauser’s Pink Es- thetic Score (PES) to judge aesthetic results (Fig. 1).4 Z5m Z5m(t) Z5c Z5s Case 1 (2008) Fig. 6 This case is presented as an example of the PES. The gingiva was prevented from growing over the implant shoulder by a well-fitting temporary crown covering the implant shoulder. This resulted in a trauma-free procedure in forming of the gingiva and cementing of the crown. The circular step represented a special challenge in the vestib- ular aesthetic and in cementing the crown. The insertion depth was coronal to the top of the thread. Implantology with single-piece implants requires special conditions in prosthetic treatment, and only a portion of the required indications can be treated (Figs. 2–5). Today, we can go further by using zirconia implants for various in- dications made by the manufacturer Z-Systems (Fig. 6).5 helps to avoid penetration of the sinus floor and addi- tionally achieves a high primary stability in weak bone (Figs. 10–12). Case 4 (2013) The implant placed in region #12 in this case was a tissue level two-piece Z5c implant by Z-Systems. The condition of the periodontium of the neighbouring teeth is important for predicting the shape of the papilla be- Description Unit TZP-A BIO-HIP® Z-Systems has a company history of 15 years, during which time it has concentrated solely on zirconium di- oxide implants. The products have been developed and manufactured together with Swiss company Metoxit (Tab. 1).6 The initial single-piece implants were followed by various two-piece implant types. Most indications to- day can be covered by this range. The most common indication in Germany is single-tooth replacement. Us- ing the treatment results presented in this article, I would now like to direct the focus to the development cycles. Components Composition Density Open porosity Grain size Case 2 (2004) The implant Z5m by Z-Systems, placed in region #25 is an example of long-term success. Thirteen years of post- treatment, and with very good dental care, it was difficult to tell whether there was more recession of the gingival mar- gin at the natural teeth than at the implant site (Figs. 7–9). Vickers hardness Mohrs hardness Compression strength Flexural strength Elasticity index – % g/cm3 % µm Hv – MPa MPa GPa Case 3 (2015) Fracture toughness K1c MN/m3/2 ZrO2/Y2O3/Al2O3 95/5/0.25 6.05 0 0.35 1,200 8 2,000 1,200 210 8 In this case, the screw implant Z5m(t) by Z-Systems, was inserted in region #15. The tapered screw design Tab. 1: Table with the composition and material properties of the Z-Systems implants used in this report.6 (Source: Metoxit) implants 1 2017 15