The University of Southampton
University of Southampton Institutional Repository

Investigation into the effect of varus-valgus orientation on load transfer in the resurfaced femoral head: a multi-femur finite element analysis

Radcliffe, I.A.J. and Taylor, M. (2007) Investigation into the effect of varus-valgus orientation on load transfer in the resurfaced femoral head: a multi-femur finite element analysis Clinical Biomechanics, 22, (7), pp. 780-786. (doi:10.1016/j.clinbiomech.2007.03.011).

Record type: Article


Background. Femoral head resurfacing is a popular procedure for younger active hip replacement patients. Whilst the current generation of metal-on-metal resurfacing arthroplasties appear to have cured the osteolysis problems that plagued earlier resurfacing implants, fracture of the femoral head and aseptic loosening are still factors of concern in its survivorship. Several studies have shown a tendency towards failure in resurfaced femurs where the implant has been set at a varus angle. This work aims to investigate the influence of varus–valgus orientation on load transfer within the resurfaced proximal femur.
Methods. This study uses Computer Tomography based finite element analysis to determine the effect of implant orientation on load transfer in the proximal femur with respect to the intact femur. A group of 16 femurs were studied to take into account inter-patient variation; four models were produced for each femur, one of the intact femur, one resurfaced with the implant set inline with the femoral neck and one each representing varus and valgus implant alignment.
Findings. Results showed the valgus aligned resurfaced femur to produce strain patterns more akin to the intact femur. As the implant’s angle to the femoral shaft increases from varus to valgus the strains in the superior femoral neck are reduced while those in the inferior neck are increased.
Interpretation. The study concluded that valgus alignment of the resurfacing arthroplasty is preferential to varus alignment; as it induces a more physiological strain pattern and reduces the risk of femoral neck fracture. These findings are in line with clinical experience, which has shown an increase of failure with varus implanted prostheses.

Full text not available from this repository.

More information

Published date: August 2007
Keywords: hip resurfacing, finite element, orientation, surgery


Local EPrints ID: 47597
ISSN: 0268-0033
PURE UUID: fb9a3094-7703-403b-bd02-50565cf941fe

Catalogue record

Date deposited: 02 Aug 2007
Last modified: 17 Jul 2017 15:03

Export record



Author: I.A.J. Radcliffe
Author: M. Taylor

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton:

ePrints Soton supports OAI 2.0 with a base URL of

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.