MODELING AND STATIC ANALYSIS OF FEMUR BONE CT SCAN DATA FOR DESIGNING OF ARTIFICIAL FEMUR FOR IMPLANT

Abstract

Hip joint is one of the most important joints in the human body. It is formed by the articulation of femur & acetabulum of the pelvis. It allows us to walk, run, jump and bears our body’s weight and the force of the strong muscles of the hip and leg. The finite element analysis (FEA), an advanced computer technique of structural stress analysis developed in engineering mechanics, was introduced to orthopedic biomechanics in 1972 to evaluate stresses in human bones. Since then, this method has been applied with increasing frequency for stress analyses of bones and bone-prosthesis structures, fracture fixation devices and various kinds of tissues other than bone. The objective of this study is the detailed study of hip joint and to develop a 3D robust solid model of femur and analyze with a consistent set of forces of body weight and abductor muscles to validate this developed model under static loading conditions. Computed Tomography (CT) scan images are used to obtain the geometry of interest. Image processing & computer-aided design (CAD) software tools are employed to obtain the 3D solid model of femur from CT images. Finite Element Analysis (FEA) of robust 3D solid model of femur is done through ANSYS. Results of this study are helpful for the orthopedic surgeon to understand the mechanical behavior of the femur bone and in hip replacement surgeries and implant designing & fixation and can develop a better implant on the basis of these results.