Finite element analysis on femoral neck and intertrochanteric fractures

• Main Author: Azrul Aziman Amran
• Other Authors: Chou Siaw Meng
• Format: Final Year Project
• Language: English
• Published: Nanyang Technological University 2020
• Subjects: Engineering::Mechanical engineering
• Online Access: https://hdl.handle.net/10356/145223
• Institution: Nanyang Technological University

A fractured hip is known as a femur fracture which is the breakage at the upper quarter of the thigh bone. It is one of the most sustained injury especially among the elderly due to osteoporosis. Hip fractures can be categorized into femoral neck fracture or intertrochanteric or subtrochanteric fractures depending on the fracture location. Internal fixation such as cannulated or non-cannulated screws or PFNA (Proximal Femoral Nail Antirotation) are common treatment for hip fractures. This report consists of both non-cannulated screws and PFNA simulations. The simulations conducted on non-cannulated screws is to verify past results and to ensure that it can be replicated. As for the PFNA simulations, it is to conduct a finite element analysis (FEA) on a PFNA implant which is the objective of this report. The objective is to study the effect of a 200 mm PFNA implant on intertrochanteric fracture using Abaqus software. The simulations were done for non-osteoporotic bones at 10 mm intervals from the baseline to 60 mm distal extension. This would allow a clearer understanding of vertical reaction force and axial stiffness, and the nature of the vertical reaction forces vs vertical displacement curve on the femur bone with PFNA implant at each distal extension. The findings suggest that the vertical reaction forces vs vertical displacement curve for the PFNA implant from the Baseline to 60 mm distal extension was linear in nature. The axial stiffness exhibits a similar linear curve pattern from the Baseline to 60 mm distal extension at 10 mm increments.