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, Steven P.; Wimmer, Markus A.

doi:10.1016/j.jbiomech.2019.03.027

Cited by 15 publications

(13 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Mell et al used this approach for wear prediction. Values of the friction coefficient between the two articulating surfaces were set as a mean value of 0.04 [16,41]. Godest et al performed FEA with coefficients of friction of 0.01, 0.04, and 0.07.…”

Section: Discussionmentioning

confidence: 99%

Analysis of Friction in Total Knee Prosthesis during a Standard Gait Cycle

et al. 2021

Self Cite

View full text Add to dashboard Cite

Total knee arthroplasty is on the rise worldwide. Despite its success, revision surgeries are also increasing. According to the American Joint Replacement Registry 2020, 3.3% of revision surgeries are due to wear, and 24.2% are due to mechanical loosening. The combination of shear stresses and wear particles occurring at the bone/implant interface can lead to local osteolysis. Although the shear stresses are partially driven by joint friction, relatively little is known about the evolution of the coefficient of friction (CoF) during a gait cycle in total knee replacement. Here we describe the CoF during a gait cycle and investigate its association with kinematics (slide–roll-ratio), applied load, and relative velocity. The artificial knee was simulated by cobalt–chromium condyle on a flat ultra-high-molecular-weight polyethylene (UHMWPE) tibial plateau, lubricated by either water or proteinaceous solution. We found that the CoF is not a constant but fluctuates between the values close to 0 and 0.15. Cross-correlation suggested that this is primarily an effect of the slide–roll ratio and the contact pressure. There was no difference in the CoF between water and proteinaceous solution. Knowledge about the CoF behavior during a gait cycle will help to increase the accuracy of future computational models of total knee replacement.

show abstract

Section: Discussionmentioning

confidence: 99%

Analysis of Friction in Total Knee Prosthesis during a Standard Gait Cycle

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…In order to answer the above-mentioned pending questions, a few papers have been published where the authors investigated, with analytical [13,14] or finite element methods [10,15], how TKR wear is affected by non-constant slide-roll ratio and non-constant load, based on an augmented version of Archard's law [16].…”

Section: Introductionmentioning

confidence: 99%

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

Fekete

2021

Acta Mech

View full text Add to dashboard Cite

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.

show abstract

“…Its determination remains an important open problem for wear testers and designers of knee implants. 4,5 Computer simulations of these standardized tests can help to reduce costs and time-to-market. While simulations cannot replace the actual compliance tests, they can help to avoid some of the preliminary tests that need to be performed during the design phase of a new implant.…”

Section: Introductionmentioning

confidence: 99%

“…Overlay of simulated and experimental wear for Mebio implant after 5-million gait cycles, with the finest grid and extrapolation step length n D = 53104 .…”

mentioning

confidence: 99%

An efficient and robust simulator for wear of total knee replacements

Burchardt

Abicht²,

Sander

2020

Proc Inst Mech Eng H

View full text Add to dashboard Cite

Wear on total knee replacements is an important criterion for their performance characteristics. Numerical simulations of such wear have seen increasing attention over the last years. They have the potential to be much faster and less expensive than the in vitro tests in use today. While it is unlikely that in silico tests will replace actual physical tests in the foreseeable future, a judicious combination of both approaches can help making both implant design and pre-clinical testing quicker and more cost-effective. The challenge today for the design of simulation methods is to obtain results that convey quantitative information and to do so quickly and reliably. This involves the choice of mathematical models as well as the numerical tools used to solve them. The correctness of the choice can only be validated by comparing with experimental results. In this article, we present finite element simulations of the wear in total knee replacements during the gait cycle standardized in the ISO 14243-1 document, used for compliance testing in several countries. As the ISO 14243-1 standard is precisely defined and publicly available, it can serve as an excellent benchmark for comparison of wear simulation methods. We use comparatively simple wear and material models, but we solve them using a new wear algorithm that combines extrapolation of the geometry changes with a contact algorithm based on nonsmooth multigrid ideas. The contact algorithm works without Lagrange multipliers and penalty parameters, achieving unparalleled stability and efficiency. We compare our simulation results with the experimental data from physical tests using two different actual total knee replacements. Even though the model is simple, we can predict the total mass loss due to wear after 5-million gait cycles, and we observe a good match between the wear patterns seen in experiments and our simulation results. When compared with a state-of-the-art penalty-based solver for the same model, we measure a roughly fivefold increase of execution speed.

show abstract

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

Cited by 15 publications

References 45 publications

Analysis of Friction in Total Knee Prosthesis during a Standard Gait Cycle

Analysis of Friction in Total Knee Prosthesis during a Standard Gait Cycle

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

An efficient and robust simulator for wear of total knee replacements

Contact Info

Product

Resources

About