This study approaches to predict factors leading to loosening effect of hip joint prosthesis. In particular, wear-associated debris provokes bone tissue osteolysis and relative diversity in mechanical properties at the articulating surfaces caused different degree of wear. This study assumed an accelerated condition for a simulation, tried to interpret the occurrence of wear debris generation and collected wear species. Furthermore, the wear species were characterized by estimating the released sequences, morphologies and doing qualitative and quantitative analyses. Scanning Electron Microscope, Inductively Coupled Plasma Mass Spectrometer and Electron Spectroscopy for Chemical Analysis were used for the filtered samples or circulated liquid, at 300K, 600K, 1.0 M and 1.3 M testing cycles, respectively. Current studies have shown that morphologies and concentrations of wear debris varied with testing cycles, which generated in sequence: initial agglomerates, e.g. carbonates from scissioned polyethylene in spherical foam, and then delaminated plate-like structures. The composition might include: metallic oxides, carbonates and mixed compounds. Accumulation of released mass increased with testing cycles, but it showed an upward relationship, probably due to delaminating at polymer surface. This simulation may provide practical data as a reference for comparing with clinical observations, further osteolysis studies, as well as loosening evolution occurred at the articulating surfaces.
|Number of pages||6|
|Journal||Chinese Journal of Medical and Biological Engineering|
|Publication status||Published - 2000|
All Science Journal Classification (ASJC) codes