Stability of prototype two-piece zirconia and titanium implants after artificial aging: an in vitro pilot study.

摘要: Background: Zirconia oral implants are a new topic in implant dentistry. So far, no data available on the biomechanical behavior of two-piece zirconia implants. Therefore, purpose this pilot investigation was to test vitro fracture strength cylindrical after aging chewing simulator. Materials and Methods: This laboratory comprised three different treatment groups. Each group consisted 16 specimens. In 1, were restored with crowns (zirconia copings veneered Triceram®; Esprident, Ispringen, Germany), 2 received Empress® single (Ivoclar Vivadent AG, Schaan, Liechtenstein). The implants, including abutments, two groups identical. 3, similar titanium reconstructed porcelain-fused-to-metal crowns. Eight samples each submitted artificial long-term load mouth (chewing simulator). Subsequently, all not artificially aged that survived loading universal testing machine. For pairwise comparisons or without between at given condition, Wilcoxon rank-sum for independent used. significance level set 5%. Results: One sample 1 (veneer fracture), none 2, six 3 (implant abutment screw fractures) failed while exposed mouth. values 1.2 million cycles 45 377 N (mean: 275.7 N), 240 314 N 280.7 N), 582 N 165.7 N). results amounted 270 393 N 325.1 N), 235 321 N 281.8 N), 474 765 N 595.2 N) group. failure mode during head bending/fracture group. Conclusions: Within limits investigation, stability tested prototype seems be – compared possibly exerted occlusal forces borderline clinical use. A high number failures occurred already level. showed irreparable fractures relatively low loads. use presented has questioned.