Retrieval Analysis of Modern Knee Tumor Megaendoprosthesis Shows Considerable Volumetric Metal Wear Generated at the Rotating Hinge

摘要: Frequently occurring damage, as well elevated blood metal ion levels, are reported in relation to a tumor and revision system for total knee arthroplasty (TKA), which applies rotating hinge coupling with metal-on-metal (MoM) articulation. As the patient collective this specific is small, there no data on wear generated from couplings. In study, volume influencing parameters were investigated at 44 retrieved TKAs MoM A scoring rating frequently abrasive between 0 (no wear) 3 (distinct was established. The score correlated time vivo, bone resection length, weight polyethylene inlay damage. Volumetric estimated applying coordinate measurements. An of two or higher found 43% cases. mean rate accounted 7.8 mm3/year. main coefficient extent vivo. We tendency scores degradation scores. Patient length did not impact wear. Assessment damage by semi-quantitative has proven be reliable option non-destructive evaluation. high.