Title: Modelling and analysis of knee and hip joints in human being

Authors: Bhaskar Kumar Madeti; Chalamalasetti Srinivasa Rao

Addresses: Department of Mechanical Engineering, Gayatri Vidya Parishad College of Engineering (A), Visakhapatnam, India ' Department of Mechanical Engineering, AU College of Engineering, Andhra University, Visakhapatnam, India

Abstract: The present work aims at developing a model of knee and hip joint which represents all the forces, by using 'free body diagrams'. In order to do force analysis one needs to study knee and hip anatomy. With the aid of MRI scan data, the dimensions are obtained further the moments and forces are computed by solving the equilibrium equations. A 3-dimensional (3D) finite element analysis is made to represent the real world situation as closely as possible. The accuracy is improved using image processing commercial software on magnetic resonance imaging (MRI) and computed tomography (CT) scans. The analysis was conducted for body weights of 600 N, 1,000 N and 1,500 N for each of the possible postures during various activities. One important recommendation that can be made from present work is that in order to find proper replacement of human knee and hip joint, one need to collect CT scan slices and then create 3D models performing FE analysis by selecting the person's weight. In other words the selected implant must be customised for the patient's weight, rather than making the choice by rule of thumb as in common practice in hospitals today.

Keywords: CT scan; MRI scan; 3D model; FE analysis; knee; hip.

DOI: 10.1504/IJMEI.2021.118764

International Journal of Medical Engineering and Informatics, 2021 Vol.13 No.6, pp.497 - 510

Received: 04 Oct 2019
Accepted: 07 Mar 2020
Published online: 05 Nov 2021 *

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