Evaluation of relative mechanical properties between prosthetic articulating surfaces

Jiunn-Der Liao, Y. C. Lai, W. P. Chen

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish
Pages (from-to)65-70
Number of pages6
JournalChinese Journal of Medical and Biological Engineering
Volume20
Issue number2
Publication statusPublished - 2000

All Science Journal Classification (ASJC) codes

  • Biophysics

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