A unified theory of wear for ultra-high molecular weight polyethylene in multi-directional sliding

Wang, A.

doi:10.1016/s0043-1648(00)00522-6

Cited by 207 publications

(164 citation statements)

References 28 publications

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“…This could be expected from other studies comparing laboratory and clinical results (McKellop et al 1981, McKellop and Clarke 1984, Wang 2001. Clinical wear rates tend to be elevated by individual patient outliers whose wear rates are many times the mean , Schmalzried et al 2000.…”

Section: Discussionsupporting

confidence: 56%

Crosslinked polyethylene compared to conventional polyethylene in total hip replacement: Pre-clinical evaluation, in-vitro testing and prospective clinical follow-up study

et al. 2006

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BackgroundPolyethylene wear-induced osteolysis is a major cause of implant loosening in total hip arthroplasty. New crosslinked polyethylenes are presumed to give lower wear rates, but no long-term clinical results are available yet.Patients and methods We compared basic material characteristics and MTS hip joint simulator wear rates of a crosslinked polyethylene (Duration) to those of conventional polyethylene. In a randomized double-blind 5-year clinical follow-up study, 133 hips (67 conventional, 66 Duration) in 127 patients were followed-up for an average of 5 (3-6) years. Wear rates were measured using a computer-based edge detection method. The radiographic appearances of wear-related phenomena were recorded.Results The Duration polyethylene showed a significantly lower in-vitro wear rate in the simulator study (mean 22 (SD 2.3) vs. 40 (SD 1.5) mm3/106 cycles). Also, the in-vivo wear was lower for Duration (mean 0.083 (SD 0.056) mm/year) than for conventional polyethylene (mean 0.123 (SD 0.082) mm/year). All radiographic signs of osteolysis were less frequent in the Duration group.Interpretation Our study has given a substantial body of evidence-from lower wear rates, less frequent signs of osteolysis, and higher survival rates after a mean follow-up of 5 years-that Duration provides better clinical outcomes than conventional polyethylene.

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Section: Discussionsupporting

confidence: 56%

Crosslinked polyethylene compared to conventional polyethylene in total hip replacement: Pre-clinical evaluation, in-vitro testing and prospective clinical follow-up study

et al. 2006

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“…where a, b and c are constants, and the CS was defined on the unified theory of wear and work [34,35,51], as the component of the frictional work perpendicular to the principal molecular orientation direction (E cross-shear ), divided by the total frictional work (E total ):…”

Section: Wear Modelmentioning

confidence: 99%

“…All previous wear predictions have used fixed load/kinematics for the wear simulation of TKR, and not considered the effect of the change of kinematics/load due to tibial insert geometry variation caused by wear [30][31][32][33]. The use of fixed load/motion in the wear simulation means that the change of these input conditions, which affects the multi-directional cross-shear motion [34,35], has not been considered. It is feasible to predict the implant wear under the patient-specific load/kinematics condition by coupling a lower extremity MSK MBD model implanted with specific knee prosthesis, with the contact mechanics model and wear model.…”

Section: Introductionmentioning

confidence: 99%

A patient-specific wear prediction framework for an artificial knee joint with coupled musculoskeletal multibody-dynamics and finite element analysis

Zhang

Chen

Wang

et al. 2017

Tribology International

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A novel wear prediction framework was developed by coupling a patient-specific lower extremity musculoskeletal multibody dynamics model with the finite element contact mechanics and wear model of total knee replacement. The tibiofemoral contact forces and kinematics were influenced by articular surface wear, and in turn, the variations from the knee dynamics resulted in increases in the volumetric wear of 404.41 mm 3 after 30 million cycle simulation from 380.86 mm 3 from the traditional wear prediction using fixed load/motions. The developed patient-specific wear prediction framework provided a reliable virtual platform for investigating articular surface wear of total knee replacements.

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“…It has been shown that the amount of 'crossing path' (cross shear) motion at the bearing interface of polyethylene-based bearings can make a large impact on wear rates [11], in that purely rectilinear or curvilinear wear tracks produce very low wear. Existing knowledge of semi-constrained TDR in vitro wear has been derived using ISO [12][13][14][15][16] and ASTM [14,16] (purely curvilinear, zero cross shear motion) methodologies.…”

Section: Introductionmentioning

confidence: 99%

Wear and biological effects of a semi-constrained total disc replacement subject to modified ISO standard test conditions

Hyde

Tipper

Fisher

et al. 2015

Journal of the Mechanical Behavior of Biomedical Materials

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Total disc replacement wear and the potential for osteolysis is a growing concern, therefore a parametric study on the effects on wear of altered kinematics and loading was undertaken. A standard ISO testing protocol was modified in order to study the wear behaviour of lumbar total disc replacements when subject to low cross shear input kinematics, reduced axial loading and smaller flexion-extension magnitude. Volumetric wear, bearing surface topography, and wear debris biological reactivity were assessed. The ISO standard results were expected, however, the very low cross shear test produced a level of wear approximately two orders of magnitude higher than that reported for zero cross shear motions on UHMWPE bearings. When the osteolytic potential of the wear particles was calculated, all total disc replacement simulations had lower predicted osteolytic potential compared to total hip replacements, as a consequence of the generally lower wear rates found.

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A unified theory of wear for ultra-high molecular weight polyethylene in multi-directional sliding

Cited by 207 publications

References 28 publications

Crosslinked polyethylene compared to conventional polyethylene in total hip replacement: Pre-clinical evaluation, in-vitro testing and prospective clinical follow-up study

Crosslinked polyethylene compared to conventional polyethylene in total hip replacement: Pre-clinical evaluation, in-vitro testing and prospective clinical follow-up study

A patient-specific wear prediction framework for an artificial knee joint with coupled musculoskeletal multibody-dynamics and finite element analysis

Wear and biological effects of a semi-constrained total disc replacement subject to modified ISO standard test conditions

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