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5246 |
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Wednesday, June 07, 2017, Hall 14 11:10 AM Medical Industry I |
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Transpiring thermally sprayed alumina layers with integrated fluid flow tubes |
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Manuel Rodriguez Diaz* / Leibniz University Hannover, Germany Kai Möhwald / Institut für Werkstoffkunde, Germany Hans Jürgen Maier/ Institut für Werkstoffkunde, Germany Nina Loftfield/ Institut für Mess- und Regelungstechnik, Germany Markus Kästner/ Institut für Mess- und Regelungstechnik, Germany Eduard Reithmeier/ Institut für Mess- und Regelungstechnik, Germany Sara Knigge/ Institut für Mehrphasenprozesse, Germany Birgit Glasmacher/ Institut für Mehrphasenprozesse, Germany |
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Osteoarthritis in the hip or knee is one of the most common diseases in industrialized countries. The implantation of an endoprosthesis as a joint replacement represents the most effective way to treat serious pathological changes in these joints. The lifetime of endoprosthesis can be shortened by aseptic inflammation and osteolysis. The main cause for the aseptic inflammations, osteolysis and thus, the failure of the endoprostheses are abrasion particles of the acetabular cup inlays that are caused by the tribological load of the prosthesis. This research project aims at optimizing the tribological behavior of coatings for endoprostheses by an active hydrodynamic lubrication of the joint with synovial fluid, while ensuring the highest possible biocompatibility, as well as the increase of the strength under static and cyclic loading. For this purpose a deterministic fluid flow tube structure is formed in a thermally sprayed alumina layer by the introduction of a leachable placeholder. This tube structure allows the transverse transport of the synovial fluid through the alumina layer. Furthermore the synovial fluid can be transported into the lubricating gap of the sliding surfaces by leaving the alumina layer through the porous surface. First results will be presented and the ramifications with respect to applications will be discussed. |