Finite element analysis of a total ankle replacement during the stance phase of gait
Reggianni, B., Leardini, A., Corozza, F. and Taylor, M. (2006) Finite element analysis of a total ankle replacement during the stance phase of gait. Journal of Biomechanics, 39, (8), 1435-1443. (doi:10.1016/j.jbiomech.2005.04.010).
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Total ankle replacement (TAR) designs have still several important issues to be addressed before the treatment becomes fully
acceptable clinically. Very little is known about the performance, in terms of the contact pressures and kinematics of TAR when
subjected to daily activities such as level gait. For this purpose, an explicit finite element model of a novel 3-component TAR was
developed, which incorporated a previously validated mechanical model of the ankle ligament apparatus. The intermediate mobile
polyethylene meniscal bearing was modelled as an elastic–plastic continuum while the articulating surfaces of the tibial and talar
metal components as rigid bodies. Overall kinematics, contact pressures and ligament forces were analysed during passive, i.e.
virtually unloaded, and active, i.e. stance phase of gait, conditions. Simulation of passive motion predicted similar kinematics as
reported previously in an analytical four-bar linkage model. The meniscal bearing was observed to move 5.6mm posteriorly during
the simulated stance and the corresponding antero-posterior displacement of the talar component was 8.3 mm. The predicted
pattern and the amount (10.61) of internal–external rotation of the ankle complex were found to be in good agreement with
corresponding in vivo measurements on normal ankles. A peak contact pressure of 16.8MPa was observed, with majority of contact
pressures below 10 MPa. For most ligaments, reaction forces remain within corresponding physiological ranges. A first realistic
representation of the biomechanical behaviour of the human ankle when replaced by prosthetic joints is provided. The applied
methodology can potentially be applied to other TAR designs.
|Subjects:||R Medicine > R Medicine (General)
T Technology > TA Engineering (General). Civil engineering (General)
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences > Bioengineering Sciences
|Date Deposited:||17 Jan 2007|
|Last Modified:||02 Mar 2012 13:29|
|Contributors:||Reggianni, B. (Author)
Leardini, A. (Author)
Corozza, F. (Author)
Taylor, M. (Author)
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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