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The relative wear resistance of three candidate coatings for titanium alloy-based orthopedic applications was compared using a reciprocating test method. Micrometer-sized powders of the following compositions were plasma sprayed onto Ti–6Al–4V (TAV) alloy: (i) Al 2 O 3 (AO), (ii) 8mol% yttria stabilized zirconia (8YSZ) and (iii) Al 2 O 3 –40wt% 8YSZ (A4Z). Deposits...
Wear of ultra-high molecular weight polyethylene is highly dependent on cross-shear, but the fundamental relation between them is not well understood. Over a half-dozen parameters for quantifying cross-shear have been proposed in the literature. The parameters are either cycle-based, defined using a cyclic motion path, or memory-based, defined only by motion history. All of the parameters have never...
Biomechanical simulators are extensively used in wear tests of total hip arthroplasty components. Those tests should be in accordance with ISO 14242-1, which specifies three or four abscissæ ordinates of angular displacements and six loads to be attained by the simulators. Nevertheless, the standard does not provide directions on the interpolation method; consequently, wear rates from similar specimens...
Ultra high molecular weight polyethylene (UHMWPE) has been extensively used as a bearing surface in joint prostheses. However, wear debris generated from this material has been associated with osteolysis and implant loosening. Alternative materials, such as polymer composites, have been investigated due to their exceptional mechanical properties. The goal of the present work was to investigate the...
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