Finite element Analysis of the Non-Stem Total Hip Prothesis

• Main Author: 林光興
• Other Authors: 陳精一
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/49069243993985366362

碩士 === 中華大學 === 機械與航太工程研究所 === 91 === Abstract The objectives of this research are investigating the performance to a new know as” Non-Stemmed Total Hip Prosthesis” in mechanics point of view. The contents include the methodology of creating the finite element model and the finite element analysis. In finite element analysis, this research consists of a newly methodology to perform an automated three-dimensional finite element meshing for total hip prosthesis, and the stress analysis to three different model known as “Non-stemmed Anatomical Total Hip Prosthesis”, based on the methodology proposed here. One is the traditional stem prosthesis and another is total femur. The merit of this method is that the automated meshing process can be reached merely using the ANSYS software alone, without utilizing the very complicate self-developed meshing interface program. As compared with many previous studies, this new methodology could provide a smooth boundary around the contour of femur and the interface between femur and prosthesis as well as avoiding the ill-conditioned element. The concept of the newly designed prosthesis resides in the minimal modification of the intact femur neck alignment after the total hip replacement under the condition of the healthy femoral neck. The main body of this newly prosthesis is a jingle-bell-shaped mask, which embraces the femoral neck tight and close. The bottom skirt of the mask contacts with the greater and lesser trochanter in such a way to keep the mask in desired position by a screw going through along axis of the femoral neck. Based on the new methodology established in this study, the finite element stress analysis is performed to compare with the stress distribution of the intact femur, the traditional total hip prosthesis and “Non-stemmed Total Hip Prosthesis”. Hopefully, this new prosthesis would be the method of choice for patient who has healthy femoral neck, but sick femoral head. At the same time, this new methodology developed here could be applied to other similar bone structure in the field of biomechanics research. Keywords：Femur, Biomechanics, Total Hip Prosthesis, Finite Element Method, Computed Tomography, Bone