Effects of proximal femoral nail antirotation (PFNA) implant on the stress distribution of the femur - a finite element study
Hip fracture also known as femur fracture, is one of the most common types of injury experienced by the aging population. A hip fracture generally occurs in the proximal femur which is known as a proximal femoral fracture. One of the main contributing factors for hip fracture is osteoporosis as it c...
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sg-ntu-dr.10356-1495302021-05-19T06:59:51Z Effects of proximal femoral nail antirotation (PFNA) implant on the stress distribution of the femur - a finite element study Loh, Christopher Meng Keat Chou Siaw Meng School of Mechanical and Aerospace Engineering MSMCHOU@ntu.edu.sg Engineering::Bioengineering Engineering::Mechanical engineering Hip fracture also known as femur fracture, is one of the most common types of injury experienced by the aging population. A hip fracture generally occurs in the proximal femur which is known as a proximal femoral fracture. One of the main contributing factors for hip fracture is osteoporosis as it causes bones to be weaker. There are many classifications of hip fracture, such as femoral-neck fracture, intertrochanteric fracture and subtrochanteric fracture. Femoral-neck fracture and intertrochanteric fracture accounts for 90% of hip fractures. Different surgical implants are needed for different type of hip fracture. The objective of this study is to determine the length of distal extension that can be tolerated by the short proximal femoral nail antirotation (PFNA-II) implant in an intertrochanteric fracture. Finite Element Analysis (FEA) using ABAQUS software was used to perform this study. Models were constructed based on AO classification 31A2.2 with axial load applied to the femoral head. Simulations were done on osteoporotic and normal bone from baseline to 120 mm distal extension. Vertical reaction force and axial stiffness experienced the steepest drop in the region of 30 to 50 mm distal extension. The side of proximal cortical shaft showed to be reaching plastic deformation for distal extension larger than 40 mm. The results obtained may suggest that the length of distal extension that can be tolerated by the short PFNA-II to be in the region of 30 to 50 mm. Bachelor of Engineering (Mechanical Engineering) 2021-05-19T06:59:51Z 2021-05-19T06:59:51Z 2021 Final Year Project (FYP) Loh, C. M. K. (2021). Effects of proximal femoral nail antirotation (PFNA) implant on the stress distribution of the femur - a finite element study. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/149530 https://hdl.handle.net/10356/149530 en C026 application/pdf Nanyang Technological University |
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Engineering::Bioengineering Engineering::Mechanical engineering Loh, Christopher Meng Keat Effects of proximal femoral nail antirotation (PFNA) implant on the stress distribution of the femur - a finite element study |
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Hip fracture also known as femur fracture, is one of the most common types of injury experienced by the aging population. A hip fracture generally occurs in the proximal femur which is known as a proximal femoral fracture. One of the main contributing factors for hip fracture is osteoporosis as it causes bones to be weaker. There are many classifications of hip fracture, such as femoral-neck fracture, intertrochanteric fracture and subtrochanteric fracture. Femoral-neck fracture and intertrochanteric fracture accounts for 90% of hip fractures. Different surgical implants are needed for different type of hip fracture. The objective of this study is to determine the length of distal extension that can be tolerated by the short proximal femoral nail antirotation (PFNA-II) implant in an intertrochanteric fracture. Finite Element Analysis (FEA) using ABAQUS software was used to perform this study. Models were constructed based on AO classification 31A2.2 with axial load applied to the femoral head. Simulations were done on osteoporotic and normal bone from baseline to 120 mm distal extension. Vertical reaction force and axial stiffness experienced the steepest drop in the region of 30 to 50 mm distal extension. The side of proximal cortical shaft showed to be reaching plastic deformation for distal extension larger than 40 mm. The results obtained may suggest that the length of distal extension that can be tolerated by the short PFNA-II to be in the region of 30 to 50 mm. |
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Chou Siaw Meng |
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Chou Siaw Meng Loh, Christopher Meng Keat |
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Final Year Project |
author |
Loh, Christopher Meng Keat |
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Loh, Christopher Meng Keat |
title |
Effects of proximal femoral nail antirotation (PFNA) implant on the stress distribution of the femur - a finite element study |
title_short |
Effects of proximal femoral nail antirotation (PFNA) implant on the stress distribution of the femur - a finite element study |
title_full |
Effects of proximal femoral nail antirotation (PFNA) implant on the stress distribution of the femur - a finite element study |
title_fullStr |
Effects of proximal femoral nail antirotation (PFNA) implant on the stress distribution of the femur - a finite element study |
title_full_unstemmed |
Effects of proximal femoral nail antirotation (PFNA) implant on the stress distribution of the femur - a finite element study |
title_sort |
effects of proximal femoral nail antirotation (pfna) implant on the stress distribution of the femur - a finite element study |
publisher |
Nanyang Technological University |
publishDate |
2021 |
url |
https://hdl.handle.net/10356/149530 |
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1701270477394149376 |