The clinical relevance of hip joint simulator testing: In vitro and in vivo comparisons

Development of wear resistant NFSS–HA novel biocomposites and study of their tribological properties for orthopaedic applications

“…In another study, Miao added stainless steel 316L fibers to hydroxyapatite to make a biocomposite (Miao, 2003). Friction and wear studies have been carried out for hip and prosthetic joint implants of various biomaterials (Gispert et al, 2006;Essner et al, 2005;GeRingera et al, 2005) such as Ti and titanium-based alloys (Barril et al, 2005), Co-Cr alloys (Spriano et al, 2005), stainless steel and biomedically coated stainless steel (Dahm and Dearnley, 2005), Ti/graphite composites (Teoh et al, 1998), Ti/TiN composites and HA stabilized zirconia composites at the interfacial or mating surfaces with or without a lubricant.…”

Friction, lubrication, and polymer transfer between UHMWPE and CoCrMo hip‐implant materials: A fluorescence microscopy study

“…1 As a result, most studies of artificial joint materials, such as alumina, cobalt-chromium-molybdenum alloys (CoCrMo), and ultrahigh molecular weight polyethylene (UHMWPE), concentrate on wear analyses, most reliably carried out with a hip-joint simulator and involving wearrate measurements and wear-particle characterization. 2 Although these studies are essential before a new material can be implanted, bench tests have been useful in investigations on the mechanisms of wear, friction, and lubrication between implant materials. Such studies are important in the development of new materials.…”

Development of a protocol for the performance evaluation of wear machines used in tests of joint prostheses

“…The latter aim at determining the product performance in clinical situations. Predictive tests on the wear of implants vary from model to model and demand sophisticated mechanical devices which are able to mimic in vivo work conditions, as stated by [6][7][8]. Mechanism and Machine Theory 61 (2013) [59][60][61][62][63][64][65][66][67] Over the recent years, tests performed using human gait simulators or orbital machines have greatly contributed to forecast joint implants wear performance.…”

“…Through in vitro tests, one can rapidly obtain wear rates in order to draw a comparison with the rates exhibited in clinically tested reference implants. If it happens that the in vitro test results do not match the ones from clinical trials, design aspects such as raw-materials, production planning and finishing, among other issues, could be modified before large-scale production and clinical trials begin [7,9].…”

“…The popularization of the BRM machine is due to the consistent reproduction of clinically observed wear rates [7,14,[22][23][24]. However, because of its mechanism, the relative movements between the prosthetic components are limited to trajectories that, spatially, follow synchronized sinusoidal curves.…”