Initial fixation of a femoral knee component: an in vitro and finite element study
by Travis A. Burgers, Jim Mason, Heidi-Lynn Ploeg
International Journal of Experimental and Computational Biomechanics (IJECB), Vol. 1, No. 1, 2009

Abstract: Loosening is the primary cause of total knee arthroplasty implant failure; therefore, to investigate this failure mode, femoral knee components were implanted in vitro on three cadaveric femurs. Bone-implant finite element (FE) models were created to predict the initial fixation of the interface of each femur. Initial fixation of the femoral knee component was successfully measured with the strain-gauged implants. Specimen-specific FE models were calibrated using the in vitro strain measurements and used to assess initial fixation. Initial fixation was shown to increase with bone density. The geometry of the implant causes the distal femur to deform plastically. It also causes higher stresses in the lateral side and higher pressures on the lateral surfaces. The implementation of plasticity in the bone material model in the FE model decreased these strains and pressures considerably from a purely elastic model, which demonstrated the importance of including plasticity.

Online publication date: Fri, 30-Jan-2009

The full text of this article is only available to individual subscribers or to users at subscribing institutions.

Existing subscribers:
Go to Inderscience Online Journals to access the Full Text of this article.

Pay per view:
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.

Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Experimental and Computational Biomechanics (IJECB):
Login with your Inderscience username and password:

    Username:        Password:         

Forgotten your password?

Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.

If you still need assistance, please email