Finite Element Analysis of the Bearing Component of Total Ankle Replacement Implants during the Stance Phase of the Gait Cycle
Total ankle arthroplasty (TAA) is a motion-preserving treatment for end-stage ankle arthritis. An effective tool for analyzing these implants’ mechanical performance and longevity in silico is finite element analysis (FEA). An FEA in ABAQUS was used to statically analyze the mechanical behavior of t...
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MDPI AG
2024-09-01
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| author | Timothy S. Jain Mohammad Noori Joseph J. Rencis Amanda Anderson Naudereh Noori Scott Hazelwood |
| author_facet | Timothy S. Jain Mohammad Noori Joseph J. Rencis Amanda Anderson Naudereh Noori Scott Hazelwood |
| author_sort | Timothy S. Jain |
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| description | Total ankle arthroplasty (TAA) is a motion-preserving treatment for end-stage ankle arthritis. An effective tool for analyzing these implants’ mechanical performance and longevity in silico is finite element analysis (FEA). An FEA in ABAQUS was used to statically analyze the mechanical behavior of the ultra-high-molecular-weight polyethylene (UHMWPE) bearing component at varying dorsiflexion/plantarflexion ankle angles and axial loading conditions during the stance phase of the gait cycle for a single cycle. The von Mises stress and contact pressure were examined on the articulating surface of the bearing component in two newly installed fixed-bearing TAA implants (Wright Medical INBONE II and Exactech Vantage). Six different FEA models of variable ankle compressive load levels and ankle angle positions, for the varying subphases of the stance phase of the gait cycle, were created. The components in these models were constrained to be conducive to the bone–implant interface, where implant loosening occurs. Our results showed that the von Mises stress and contact pressure distributions increased as the compressive load increased. The highest stress was noted at dorsiflexion angles > 15°, in areas where the UHMWPE liner was thinnest, at the edges of the talar and UHMWPE components, and during the terminal stance phase of the gait cycle. This static structural analysis highlighted these failure regions are susceptible to yielding and wear and indicated stress magnitudes that are in agreement (within 25%) with those in previous static structural TAA FEAs. The mechanical wear of the UHMWPE bearing component in TAA can lead to aseptic loosening and peri-implant cyst formation over time, requiring surgical revision. This study provides ankle replacement manufacturers and orthopedic surgeons with a better understanding of the stress response and contact pressure sustained by TAA implants, which is critical to optimizing implant longevity and improving patient care. |
| format | Article |
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| institution | OA Journals |
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| language | English |
| publishDate | 2024-09-01 |
| publisher | MDPI AG |
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| series | BioMedInformatics |
| spelling | doaj-art-9463df901f0e4ab892bfeb6246331e2f2025-08-20T01:56:05ZengMDPI AGBioMedInformatics2673-74262024-09-01431949197810.3390/biomedinformatics4030107Finite Element Analysis of the Bearing Component of Total Ankle Replacement Implants during the Stance Phase of the Gait CycleTimothy S. Jain0Mohammad Noori1Joseph J. Rencis2Amanda Anderson3Naudereh Noori4Scott Hazelwood5Department of Mechanical Engineering, California Polytechnic State University, San Luis Obispo, CA 93407, USADepartment of Mechanical Engineering, California Polytechnic State University, San Luis Obispo, CA 93407, USASchool of Engineering, College of Aviation, Embry-Riddle Aeronautical University World Campus, 1 Aerospace Boulevard, Daytona Beach, FL 32114, USADepartment of Orthopedic Surgery, University of California-Irvine, Orange, CA 92868, USADepartment of Orthopedic Surgery, University of California-Irvine, Orange, CA 92868, USABiomedical Engineering, California Polytechnic State University, San Luis Obispo, CA 93407, USATotal ankle arthroplasty (TAA) is a motion-preserving treatment for end-stage ankle arthritis. An effective tool for analyzing these implants’ mechanical performance and longevity in silico is finite element analysis (FEA). An FEA in ABAQUS was used to statically analyze the mechanical behavior of the ultra-high-molecular-weight polyethylene (UHMWPE) bearing component at varying dorsiflexion/plantarflexion ankle angles and axial loading conditions during the stance phase of the gait cycle for a single cycle. The von Mises stress and contact pressure were examined on the articulating surface of the bearing component in two newly installed fixed-bearing TAA implants (Wright Medical INBONE II and Exactech Vantage). Six different FEA models of variable ankle compressive load levels and ankle angle positions, for the varying subphases of the stance phase of the gait cycle, were created. The components in these models were constrained to be conducive to the bone–implant interface, where implant loosening occurs. Our results showed that the von Mises stress and contact pressure distributions increased as the compressive load increased. The highest stress was noted at dorsiflexion angles > 15°, in areas where the UHMWPE liner was thinnest, at the edges of the talar and UHMWPE components, and during the terminal stance phase of the gait cycle. This static structural analysis highlighted these failure regions are susceptible to yielding and wear and indicated stress magnitudes that are in agreement (within 25%) with those in previous static structural TAA FEAs. The mechanical wear of the UHMWPE bearing component in TAA can lead to aseptic loosening and peri-implant cyst formation over time, requiring surgical revision. This study provides ankle replacement manufacturers and orthopedic surgeons with a better understanding of the stress response and contact pressure sustained by TAA implants, which is critical to optimizing implant longevity and improving patient care.https://www.mdpi.com/2673-7426/4/3/107bioengineeringtotal ankle replacement (TAR)bearing componentUHMWPEfinite element analysisvon Mises stress |
| spellingShingle | Timothy S. Jain Mohammad Noori Joseph J. Rencis Amanda Anderson Naudereh Noori Scott Hazelwood Finite Element Analysis of the Bearing Component of Total Ankle Replacement Implants during the Stance Phase of the Gait Cycle BioMedInformatics bioengineering total ankle replacement (TAR) bearing component UHMWPE finite element analysis von Mises stress |
| title | Finite Element Analysis of the Bearing Component of Total Ankle Replacement Implants during the Stance Phase of the Gait Cycle |
| title_full | Finite Element Analysis of the Bearing Component of Total Ankle Replacement Implants during the Stance Phase of the Gait Cycle |
| title_fullStr | Finite Element Analysis of the Bearing Component of Total Ankle Replacement Implants during the Stance Phase of the Gait Cycle |
| title_full_unstemmed | Finite Element Analysis of the Bearing Component of Total Ankle Replacement Implants during the Stance Phase of the Gait Cycle |
| title_short | Finite Element Analysis of the Bearing Component of Total Ankle Replacement Implants during the Stance Phase of the Gait Cycle |
| title_sort | finite element analysis of the bearing component of total ankle replacement implants during the stance phase of the gait cycle |
| topic | bioengineering total ankle replacement (TAR) bearing component UHMWPE finite element analysis von Mises stress |
| url | https://www.mdpi.com/2673-7426/4/3/107 |
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