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

Nicola Cairns, Mark Pearcy, James Smeathers, Clayton Adam

Research output: Contribution to journalArticle

6 Citations (Scopus)
266 Downloads (Pure)

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.
Original languageEnglish
Pages (from-to)39-47
Number of pages9
JournalMedical and Biological Engineering and Computing
Volume51
Issue number1-2
DOIs
Publication statusPublished - Feb 2013

Keywords

  • natural frequency
  • resonant frequency
  • transfemoral
  • vibration
  • composite femur
  • osseointegration

Fingerprint Dive into the research topics of 'Ability of modal analysis to detect osseointegration of implants in transfemoral amputees: a physical model study'. Together they form a unique fingerprint.

Cite this