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Finite Element Modeling to Aid in Refining the Rehabilitation of Amputees Using Osseointegrated Prostheses

Lee, Winson C.C., Frossard, Laurent A., Cairns, Nicola J., Branemark, Rickard, Evans, John H., Adam, Clayton J., & Pearcy, Mark J. (2007) Finite Element Modeling to Aid in Refining the Rehabilitation of Amputees Using Osseointegrated Prostheses. In Duffy, Vincent G. (Ed.) First International Conference on Digital Human Modeling, ICDHM 2007, Held as Part of HCI International: Digital Human Modeling, July 22-27, 2007, Beijing, China.

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Abstract

The direct anchorage of a lower-limb prosthesis to the bone has been shown to be an excellent alternative for amputees experiencing complications in using a conventional prosthetic socket. After surgical implantation, amputees have to go through a weight bearing exercise program to prepare the bone to tolerate forces and promote bone-remodeling. Currently, the load magnitude prescribed by the clinician is measured by a weight scale which reports only the axial force in the limb. Previous study using a load transducer revealed that in addition to the axial force there were other forces and moments. This study develops a FE model and utilizes our load data to investigate the stress distribution at the bone-implant interface. The model shows that the stress distribution could be highly non-uniform during the exercise. Bone-implant interface stress has certain implications in pain adaptation and bone-remodeling, and a good understanding of it can assist in future attempts to refine and shorten the period of rehabilitation exercise.

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ID Code: 15236
Item Type: Conference Paper
Keywords: transfemoral amputation, bone anchorage prosthetics, osseointegration, weight bearing exercise, finite element modeling
DOI: 10.1007/978-3-540-73321-8_75
ISBN: 9783540733188
ISSN: 1611-3349
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Biomechanical Engineering (090302)
Divisions: Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2007 Springer
Copyright Statement: This is the author-version of the work. Conference proceedings published, by Springer Verlag, will be available via SpringerLink. http://www.springer.de/comp/lncs/ Lecture Notes in Computer Science
Deposited On: 17 Oct 2008
Last Modified: 29 Feb 2012 23:40

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