Investigation into the affect of cementing techniques on load transfer in the resurfaced femoral head: a multi-femur FE based study


Radcliffe, I.A.J. and Taylor, M. (2007) Investigation into the affect of cementing techniques on load transfer in the resurfaced femoral head: a multi-femur FE based study. Clinical Biomechanics, 22, (4), 422-430. (doi:10.1016/j.clinbiomech.2006.12.001).

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Description/Abstract

Background. Femoral head resurfacing is a popular procedure for younger active hip replacement patients. Two major cementing
techniques are used in femoral component fixation; producing varying cement mantle thicknesses. Each technique has benefits, but it
is not known if cement mantle thickness is detrimental to load transfer within the proximal femur.

Methods. This study uses computer tomography based finite element analysis to determine the effect of cement mantle thickness on
strain in the resurfaced femoral head. A group of 16 femurs were investigated to take into account inter-patient variation; a factor often
over-looked in such studies.

Findings. Results showed strain in the proximal femoral head to decrease with increasing cement thickness, with a slight increase in
strain in the posterior–superior neck. Cementing of the implant guide-pin produced marked reductions in strain in the head and neck
except for the posterior–inferior neck; where it increased slightly.

Interpretation. The study concluded that a thicker cement mantle increases strain shielding within the superior resurfaced femoral
head; although short to medium term clinical trials do not suggest these factors to be of much concern. The analysis also found strain
to increase around the inferior head–neck junction with a thinner mantle. Cementing the guide pin resulted in increased strain shielding
whilst simultaneously shifting peak loads distally along the femoral neck. This work found that modelling a group of femurs was a useful
tool for better interpreting the loading in the resurfaced femur.

Item Type: Article
ISSNs: 0268-0033 (print)
Related URLs:
Keywords: hip, resurfacing, cement, finite element analysis
Subjects: T Technology > TJ Mechanical engineering and machinery
R Medicine > RD Surgery
Divisions: University Structure - Pre August 2011 > School of Engineering Sciences > Bioengineering Sciences
ePrint ID: 47594
Date Deposited: 03 Aug 2007
Last Modified: 27 Mar 2014 18:31
URI: http://eprints.soton.ac.uk/id/eprint/47594

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