Wanivenhaus A, Gottsauner-Wolf F, Brettschneider W, Seidl G, Ruatti H
Orthopädische Universitätsklinik, Wien.
Z Orthop Ihre Grenzgeb. 1990 Nov-Dec;128(6):612-6. doi: 10.1055/s-2008-1040013.
Since 1984 35 PCA unicondylar endoprostheses of the knee joint were implanted due to unicondylar high grade osteoarthritis or Morbus Ahlbäck. 19 endoprostheses with a minimum follow up of two years were investigated. Three implants had to be changed because of an aseptic loosening and were retrieved for histomorphological analysis. The implants which were found clinically stable were graded from the patients point of view as excellent to fair. Only in 5 cases, however, no seam at the implants interface was found in the radiological screening. These radiological lucencies can only be seen in x-ray amplifier controlled x-rays. No correlation has been seen of the clinical performance to the type of anchorage. The position of the implants which had revision was fair in one case and poor in two cases, although a correlation between the radiological seam and the position of the implant was not found. The histological analysis showed up a well developed osseointegration on the femoral component in the area of the porous coated pegs. At the interface to the bone of the tibial components intervening connective tissue has been found. 3 implants still in function have to be seen as endangered to loosening and further 8 prostheses with partial radiolucencies might become potential failures.
自1984年以来，由于单髁重度骨关节炎或阿尔贝克病，共植入了35个膝关节单髁全膝关节置换假体。对19个随访至少两年的假体进行了研究。3个假体因无菌性松动而不得不更换，并取出进行组织形态学分析。从患者角度看，临床稳定的假体评级为优至良。然而，在放射学筛查中，仅在5例中未发现假体界面处有缝隙。这些放射学透亮区只能在X射线增强器控制的X射线中看到。临床性能与固定类型之间未发现相关性。进行翻修的假体位置，1例良好，2例较差，尽管未发现放射学缝隙与假体位置之间存在相关性。组织学分析显示，在多孔涂层钉区域的股骨部件上有良好的骨整合。在胫骨部件与骨的界面处发现了中间结缔组织。3个仍在使用的假体被视为有松动风险，另外8个有部分透亮区的假体可能会成为潜在的失败病例。
