caa a22 4500 475782445 CHVBK 20180406123648.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1023/A:1008928219843 doi (NATIONALLICENCE)springer-10.1023/A:1008928219843 Modeling of damage to articulating surfaces by third body particles in total joint replacements [Elektronische Daten] [C. Mcnie, D. Barton, J. Fisher, M. Stone] Numerous small scratches and some larger scratches have been observed on metallic femoral heads of explanted hip prostheses, with the larger scratches believed to be a major contributor to increased wear of the polyethylene acetabular cups. Previous work in our group has shown that smaller scratches, with a mean lip height up to 0.35 μm, can be caused by bone cement and bone particles up to 500 μm in size [1]. However, the larger scratches were not readily replicated with these particles. Therefore in this study experimental and theoretical models have been developed to investigate the damage caused by harder metallic and ceramic particles. Small 10 μm diameter spherical metallic particles were also found to produce small fine scratches on the metallic counterface. However larger diameter spherical metal particles greater than 100 μm in diameter, which were embedded in polyethylene pins, caused severe sharp scratching of the metallic counterface with scratch lips greater than 0.5 μm. This level of damage, which was comparable to the severe damage found in vivo, was also simulated by a three body finite element model. Thus the larger metal particles led to the type of damage which was predicted to increase wear dramatically. This technique for simulating severe in vivo third body damage using spherical metal particles was found to be reproducible and reliable and will be used in the future in hip simulator testing to replicate third body damage and wear. Kluwer Academic Publishers, 2000 Mcnie C. School of Mechanical Engineering, University of Leeds, LS2 9JT, Leeds, UK aut Barton D. School of Mechanical Engineering, University of Leeds, LS2 9JT, Leeds, UK aut Fisher J. School of Mechanical Engineering, University of Leeds, LS2 9JT, Leeds, UK aut Stone M. Leeds General Infirmary, LS1 3EX, Leeds, UK aut Journal of Materials Science: Materials in Medicine Kluwer Academic Publishers 11/9(2000-09-01), 569-578 0957-4530 11:9<569 2000 11 10856 https://doi.org/10.1023/A:1008928219843 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1008928219843 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Mcnie C. School of Mechanical Engineering, University of Leeds, LS2 9JT, Leeds, UK aut NATIONALLICENCE 700 1- Barton D. School of Mechanical Engineering, University of Leeds, LS2 9JT, Leeds, UK aut NATIONALLICENCE 700 1- Fisher J. School of Mechanical Engineering, University of Leeds, LS2 9JT, Leeds, UK aut NATIONALLICENCE 700 1- Stone M. Leeds General Infirmary, LS1 3EX, Leeds, UK aut NATIONALLICENCE 773 0- Journal of Materials Science: Materials in Medicine Kluwer Academic Publishers 11/9(2000-09-01), 569-578 0957-4530 11:9<569 2000 11 10856 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer