In the present study the first clinical results of endosseous screw implants made of zirconia (type Z-Look3, Z-Systems) are evaluated. In total 189 implants in 71 test subjects were examined. The mean implant duration was 8.2 months. After one year the probability of survival according to Kaplan-Meier was 93%. The success of the implants was also evaluated according to clinical and radiological examination parameters, as defined in the success criteria catalogue by Jahn and d‘Hoedt [10]. After one year the probability of success in this group (n=44) was also 93%. Compared with similar studies on titanium implants, zirconia implants perform comparably well in both implant duration analyses. If one takes the aesthetic advantages of zirconia compared with titanium into account, then the results lead one to assume that zirconia will become established in the future alongside titanium in dental implantology. Clinical long-term studies will have to clarify what importance can be attributed to these fi rst results.