A failure envelope approach to characterizing strength of an amputated femur with a bone-anchored percutaneous implant
Abstract Bone-anchored percutaneous implants, commonly referred to as osseointegrated implants, are gaining popularity as an alternative to sockets for attaching a prosthetic limb to an amputated femur. While these implants have several advantages, femoral fractures are relatively common in these pa...
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| Language: | English |
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Nature Portfolio
2024-11-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-78421-3 |
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| author | Hans A. Gray Ryan Tiew Dale L. Robinson David Ackland Peter V. S. Lee |
| author_facet | Hans A. Gray Ryan Tiew Dale L. Robinson David Ackland Peter V. S. Lee |
| author_sort | Hans A. Gray |
| collection | DOAJ |
| description | Abstract Bone-anchored percutaneous implants, commonly referred to as osseointegrated implants, are gaining popularity as an alternative to sockets for attaching a prosthetic limb to an amputated femur. While these implants have several advantages, femoral fractures are relatively common in these patients, occurring in 6.3% of femurs within 4 years. This study aimed to develop a novel method to quantify femoral strength under all possible external loads acting on the distal implant. Finite element analysis was used to explore combinations of forces and moments that, when applied on the bone-anchored implant, were just sufficient to fracture the femur. The 6-dimensional envelope generated in the current study provided a quantitative description of the strength of the femur-implant construct. All the femoral fractures were predicted in the trochanteric region, corresponding to where most in vivo fractures have been reported. The 6-dimensional envelopes developed in the current study may be useful in the design of fail-safe devices that could reduce femoral fractures in patients with bone-anchored percutaneous femoral implants. The framework presented may also be used for determining patient suitability for bone-anchored percutaneous implants, and for evaluating the functional performance of implant designs. |
| format | Article |
| id | doaj-art-a4adb77d0d4c47c39f89f30ae0eb6be3 |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj-art-a4adb77d0d4c47c39f89f30ae0eb6be32024-11-24T12:21:17ZengNature PortfolioScientific Reports2045-23222024-11-0114111110.1038/s41598-024-78421-3A failure envelope approach to characterizing strength of an amputated femur with a bone-anchored percutaneous implantHans A. Gray0Ryan Tiew1Dale L. Robinson2David Ackland3Peter V. S. Lee4Department of Biomedical Engineering, University of MelbourneDepartment of Biomedical Engineering, University of MelbourneDepartment of Biomedical Engineering, University of MelbourneDepartment of Biomedical Engineering, University of MelbourneDepartment of Biomedical Engineering, University of MelbourneAbstract Bone-anchored percutaneous implants, commonly referred to as osseointegrated implants, are gaining popularity as an alternative to sockets for attaching a prosthetic limb to an amputated femur. While these implants have several advantages, femoral fractures are relatively common in these patients, occurring in 6.3% of femurs within 4 years. This study aimed to develop a novel method to quantify femoral strength under all possible external loads acting on the distal implant. Finite element analysis was used to explore combinations of forces and moments that, when applied on the bone-anchored implant, were just sufficient to fracture the femur. The 6-dimensional envelope generated in the current study provided a quantitative description of the strength of the femur-implant construct. All the femoral fractures were predicted in the trochanteric region, corresponding to where most in vivo fractures have been reported. The 6-dimensional envelopes developed in the current study may be useful in the design of fail-safe devices that could reduce femoral fractures in patients with bone-anchored percutaneous femoral implants. The framework presented may also be used for determining patient suitability for bone-anchored percutaneous implants, and for evaluating the functional performance of implant designs.https://doi.org/10.1038/s41598-024-78421-3Transfemoral amputationFinite element analysisBone-anchored implantOsseointegrated implantProsthetics. |
| spellingShingle | Hans A. Gray Ryan Tiew Dale L. Robinson David Ackland Peter V. S. Lee A failure envelope approach to characterizing strength of an amputated femur with a bone-anchored percutaneous implant Scientific Reports Transfemoral amputation Finite element analysis Bone-anchored implant Osseointegrated implant Prosthetics. |
| title | A failure envelope approach to characterizing strength of an amputated femur with a bone-anchored percutaneous implant |
| title_full | A failure envelope approach to characterizing strength of an amputated femur with a bone-anchored percutaneous implant |
| title_fullStr | A failure envelope approach to characterizing strength of an amputated femur with a bone-anchored percutaneous implant |
| title_full_unstemmed | A failure envelope approach to characterizing strength of an amputated femur with a bone-anchored percutaneous implant |
| title_short | A failure envelope approach to characterizing strength of an amputated femur with a bone-anchored percutaneous implant |
| title_sort | failure envelope approach to characterizing strength of an amputated femur with a bone anchored percutaneous implant |
| topic | Transfemoral amputation Finite element analysis Bone-anchored implant Osseointegrated implant Prosthetics. |
| url | https://doi.org/10.1038/s41598-024-78421-3 |
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