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Ability of modal analysis to detect osseointegration of implants in transfemoral amputees : a physical model study

Cairns, Nicola J., Pearcy, Mark J., Smeathers, James E., & Adam, Clayton J. (2012) Ability of modal analysis to detect osseointegration of implants in transfemoral amputees : a physical model study. Medical and Biological Engineering and Computing.

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Abstract

Owing to the successful use of non-invasive vibration analysis to monitor the progression of dental implant healing and stabilization, it is now being considered as a method to monitor femoral implants in transfemoral amputees. This study uses composite femur-implant physical models to investigate the ability of modal analysis to detect changes at the interface between the implant and bone simulating those that occur during osseointegration. Using electromagnetic shaker excitation, differences were detected in the resonant frequencies and mode shapes of the model when the implant fit in the bone was altered to simulate the two interface cases considered: firm and loose fixation. The study showed that it is beneficial to examine higher resonant frequencies and their mode shapes (rather than the fundamental frequency only) when assessing fixation. The influence of the model boundary conditions on the modal parameters was also demonstrated. Further work is required to more accurately model the mechanical changes occurring at the bone-implant interface in vivo, as well as further refinement of the model boundary conditions to appropriately represent the in vivo conditions. Nevertheless, the ability to detect changes in the model dynamic properties demonstrates the potential of modal analysis in this application and warrants further investigation.

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ID Code: 54616
Item Type: Journal Article
Keywords: Natural frequency, Resonant frequency, vibration, composite femur, osseointegration, transfemoral amputee, transfemoral osseointegration
DOI: 10.1007/s11517-012-0962-0
ISSN: 1741-0444
Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > BIOMEDICAL ENGINEERING (090300) > Biomechanical Engineering (090302)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > CLINICAL SCIENCES (110300) > Orthopaedics (110314)
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Current > Schools > School of Exercise & Nutrition Sciences
Copyright Owner: Copyright 2012 International Federation for Medical and Biological Engineering
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 07 Nov 2012 09:53
Last Modified: 09 Nov 2012 15:05

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