A pendulum test as a tool to evaluate viscous friction parameters in the equine fetlock joint

[en] An equine fetlock joint pendulum test was studied and the influence of post mortem time and intra-articular lipid solvent on the viscous frictional response examined. Fresh equine digits (group 1, n=6 controls; group 2, n=6 lipid solvent) were mounted on a pendulum tribometer. Assuming that pendular joint damping could be modelled by a harmonic oscillator fluid damping (HOFD), damping time (τ), viscous damping coefficient (c) and friction coefficient (μ) were monitored for 5h under experimental conditions (400N; 20°C). In all experiments, pendular joint damping was found to follow an exponential decay function (R(2)=0.99714), which confirmed that joint damping was fluid. The evolution of τ, c and μ was found to be significantly (P<0.05) different in the two groups, with a decrease in τ and an increase in c and μ that was faster and more prominent in digits from group 2. It was concluded that pendular joint damping could be modelled by a HOFD model. The influence of post mortem time on results suggested that, ideally, joint mechanical properties should only be tested on fresh cadavers at the same post mortem time. Moreover, the addition of lipid solvent was found to be responsible for upper viscous friction parameters and for a reduced damping time, which suggested that articular lubricating ability was compromised. This equine pendulum test could be used to test the efficacy of various bio-lubricant treatments.

Disciplines :

Veterinary medicine & animal health

Author, co-author :

Noble, Prisca ; Université de Liège - ULiège > Département de morphologie et pathologie > Anatomie

Lumay, Geoffroy ; Université de Liège - ULiège > Département de physique > Physique statistique

Coninx, Marc ; Université de Liège - ULiège > Clinique des grands animaux (chirurgie)

Collin, Bernard

Magnée, Adrien ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Département d'aérospatiale et mécanique

Lecomte-Beckers, Jacqueline ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Science des matériaux métalliques

Denoix, Jean-Marie

Serteyn, Didier ; Université de Liège - ULiège > Département clinique des animaux de compagnie et des équidés > Anesthésiologie gén. et pathologie chirurg. des grds animaux

Language :

English

Title :

A pendulum test as a tool to evaluate viscous friction parameters in the equine fetlock joint

Publication date :

May 2011

Journal title :

Veterinary Journal

ISSN :

1090-0233

eISSN :

1532-2971

Publisher :

Elsevier

Volume :

188

Issue :

Pages :

204-209

Peer reviewed :

Peer Reviewed verified by ORBi

Available on ORBi :

since 24 July 2011

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