每年出版 4 期
ISSN 打印: 1050-6934
ISSN 在线: 1940-4379
Indexed in
A Study on Polyethylene Stresses in Mobile-Bearing and Fixed-Bearing Total Knee Arthroplasty (TKA) using Explicit Finite Element Analysis
摘要
Mobile-bearing total knee arthroplasty designs were thought to be associated with lesser stresses on the polyethylene (PE) insert as compared to fixed-bearing designs. The wear rate of the PE liner was felt to be less in the mobile-bearing knees due to the decrease in the stresses. However, a reevaluation of the biomechanics of the mobile-bearing design is necessary due to the recent clinical reports on the long-term outcome of mobile-bearing knees which have not demonstrated any significant benefit in terms of implant survival and polyethylene wear rate. In this explicit finite element analysis of mobile-bearing and fixed-bearing knee designs using LS-DYNA, no significant differences have been found in the maximal stresses in the superior (articulating) surface of the PE insert in mobile- and fixed-bearing designs. On the inferior surface of the PE insert, the peak stresses were nearly 30% higher in the mobile-bearing compared with the fixed-bearing design. Thus, contrary to earlier expectations, mobile-bearing designs may be associated with higher overall PE stresses and wear than the fixed-bearing designs. Further research is necessary to minimize the wear rate of the PE insert in mobile-bearing total knee arthroplasty.
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Innocenti Bernardo, Labey Luc, Kamali Amir, Pascale Walter, Pianigiani Silvia, Development and Validation of a Wear Model to Predict Polyethylene Wear in a Total Knee Arthroplasty: A Finite Element Analysis, Lubricants, 2, 4, 2014. Crossref
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Wang Lin, Isaac Graham, Wilcox Ruth, Jones Alison, Thompson Jonathan, Finite element analysis of polyethylene wear in total hip replacement: A literature review, Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine, 233, 11, 2019. Crossref
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Takian Wisanupong, Rooppakhun Supakit, Ariyarit Atthaphon, Sucharitpwatskul Sedthawatt, Optimal Conformity Design of Tibial Insert Component Based on ISO Standard Wear Test Using Finite Element Analysis and Surrogate Model, Symmetry, 13, 12, 2021. Crossref
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Kebbach Maeruan, Soodmand Iman, Krueger Sven, Grupp Thomas M., Woernle Christoph, Bader Rainer, Biomechanical Assessment of Mobile-Bearing Total Knee Endoprostheses Using Musculoskeletal Simulation, Applied Sciences, 12, 1, 2021. Crossref