Effects of knee simulator control method and radiation dose on UHMWPE wear rate, and relationship between wear rate and clinical revision rate in National Joint Registry

Okazaki, Yoshimitsu; Hosoba, Minako; S, Miura; Mochizuki, Tadashi

doi:10.1016/j.jmbbm.2018.09.034

Cited by 10 publications

(6 citation statements)

References 33 publications

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“…Based on the numerically obtained total wear results, when compared to the total wear of other knee replacements from the literature [36], PS, CR and Prototype TKRs are situated in the middle range (Table 4). This comparison serves as a basic validation for the multibody dynamic simulation.…”

Section: Discussionmentioning

confidence: 99%

Computational study on lateral and medial wear characterization in knee implants by a multibody dynamic system

Fekete

2021

Acta Mech

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Wear is one of the main mechanical factors that limits the survival of total knee replacements (TKRs) and it is known to be highly dependent on the local kinematics of the knee joint. In this study, an analytical wear model was coupled to a multibody dynamic model to obtain wear distribution at the lateral and medial contact plateaus of different TKRs. The major aim was to analyze if wear distribution on the contact plateaus can be an indicator of elevated tibiofemoral misalignment which can lead to rapid TKR failure. For the multibody dynamic simulations, commercial and prototype TKR geometries were used, coupled with an augmented Archard’s law. Squat movement was chosen due to its importance both in sports and in everyday life. As a conclusion, a new parameter, denoted as wear imbalance, is introduced, which can indicate whether a TKR, due to its geometrical features, is prone to be subjected to elevated wear and failure.

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Section: Discussionmentioning

confidence: 99%

Computational study on lateral and medial wear characterization in knee implants by a multibody dynamic system

Fekete

2021

Acta Mech

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“…The increase in contact area with newer conforming designs requires balance between decreasing articulating surface contact stress throughout the articulation area and potentially increasing wear of the implant [46][47][48]. Edge loading is also F I G U R E 3 Load versus displacement control: kinetics and kinematics profiles (a) rotational axis [24], (b) Load control, 2014 [25], (c) Displacement control 2014 [25] reduced in the event of femoral lift-off through coronal geometry modifications [49].…”

Section: Evolution Of Knee Implant Designmentioning

confidence: 99%

Section: Evolution Of Knee Implant Designmentioning

confidence: 99%

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The development of simulator testing for total knee replacements

Maag¹,

Metcalfe²,

Cracaoanu³

et al. 2021

Biosurface and Biotribology

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Professor Duncan Dowson was a pioneer in the field of tribology and simulator design. His work sparked many branches of research across orthopaedics. The first knee simulator described by Dowson was intended to measure the wear performance of early total knee replacements (TKRs). The industry has since advanced to achieve simulator designs with significant improvements including multi-station, multi-axis, multi-control, and multi-environmental capabilities. These simulators are used to test and compare not only wear, but also the kinematic/kinetic behaviour of TKRs and many other TKR design interactions prior to implantation. This has led to changes to the design of TKRs ranging from improvements to the tibial insert to the femoral component; all, in some way, thanks to Professor Duncan Dowson's inquisitive nature. This article provides a selective review to show the interdependencies of research and development endeavours starting with the evolution of knee simulators, the many advances in TKRs and finally the interconnection with cadaveric motion simulators.This is an open access article under the terms of the Creative Commons Attribution-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited and no modifications or adaptations are made.

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“…However, a change in femoral CoR may have more of an effect on wear under the fixed kinematics of displacement control, as opposed to force control where an implant would respond to a change in testing conditions with a change in kinematics. In addition, the displacement controlled ISO Standard and other displacement control testing protocols are widely used (Abdelgaied et al, 2017;Abdel-Jaber et al, 2016Ash et al, 2000;Barnett et al, 2002Barnett et al, , 2001Brandt et al, 2011;Brockett et al, 2016Brockett et al, , 2012Galvin et al, 2009;McEwen et al, 2005;Mell et al, 2018;O'Brien et al, 2014;Okazaki et al, 2019;Popoola et al, 2010), making investigations into how the choice of CoR affects wear testing under displacement control all the more necessary.…”

Section: Introductionmentioning

confidence: 99%

The choice of the femoral center of rotation affects material loss in total knee replacement wear testing – A parametric finite element study of ISO 14243-3

Mell

Wimmer

2019

Journal of Biomechanics

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A leading cause of long-term failure of total knee replacements (TKRs) is osteolysis caused by polyethylene wear particles. The current gold standard for preclinical wear testing of TKRs is mechanical knee simulators. The definition of the femoral center of flexion-extension rotation (CoR) has been identified as one possible source of variability within TKR wear tests, since the femoral curvature varies from distal to posterior. The magnitude of the influence on wear due to changes in location of femoral CoR has not been investigated in depth. During this study, a computational framework utilizing finite element analysis for modelling wear of TKRs was developed and used to investigate the influence of the location of femoral CoR on TKR polyethylene wear during standardized displacement controlled testing (ISO 14243-3:2014). The study was carried out using a 40-point Latin Hypercube Design of Experiments approach. Volumetric wear was highly correlated to femoral CoR in both the superior/inferior and anterior/ posterior directions, with a stronger relationship in the superior/inferior direction. In addition, wear scars showing linear penetration were examined, with large differences in simulations at the extreme ends of the sampling region. In this study, it was found that variations in the location of the femoral center of rotation can represent a large source of variability in the preclinical testing and evaluation of the wear performance of total knee replacements. This study represents the first attempt at quantifying the effect on wear of different femoral center of rotations across a large sampling space.

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Effects of knee simulator control method and radiation dose on UHMWPE wear rate, and relationship between wear rate and clinical revision rate in National Joint Registry

Cited by 10 publications

References 33 publications

Computational study on lateral and medial wear characterization in knee implants by a multibody dynamic system

Computational study on lateral and medial wear characterization in knee implants by a multibody dynamic system

The development of simulator testing for total knee replacements

The choice of the femoral center of rotation affects material loss in total knee replacement wear testing – A parametric finite element study of ISO 14243-3

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