A finite element model for the wear analysis of polyethylene inserts in total knee joints
type: Item
instance of: scholarly article
zbMATH Open document ID: 0988.74524
author: C. Bignardi
author: M. P. Cavatorta
author: A. Maggiora
author: P. M. Calderale
publication date: 2002-07-22T00:00:00Z
Mathematics Subject Classification ID: 74L15
Mathematics Subject Classification ID: 74S05
Mathematics Subject Classification ID: 92C10
zbMATH DE Number: 1719533
zbMATH Keywords: total knee replacement
zbMATH Keywords: knee kinematics
zbMATH Keywords: wear
zbMATH Keywords: finite element model
zbMATH Keywords: UHMWPE
MaRDI profile type: Publication
title: A finite element model for the wear analysis of polyethylene inserts in total knee joints
published in: International Journal of Applied Mechanics and Engineering
review text: In the present work, a wear evaluation of the UHMWPE tibial insert of a total knee joint is attempted based on a simple wear model. A user subroutine has been written and integrated into a commercial finite element program to allow for a structural-kinematic model of the joint. The kinematic model simulates the relative angular velocity and linear movements between tibia and femur during walking. The input data consist of internal-external rotation and flexion-extension angle as taken from the literature. In the simulation, the femoral and tibial components are compressed vertically under gait loads, while at different orientations as determined by the kinematic model. A stress history of each element during the gait cycle is determined. The calculation of the product between the contact pressure and the node relative velocity, as given by the kinematic model, is then used for a qualitative determination of wear maps.
description: scientific article; zbMATH DE number 1719533