Validation of a subject specific canine hind limb model with emphasis on an anatomical stifle

The objective of this study was to validate a subject specific multibody limb level model of a canine hind limb and incorporate joint level modeling techniques to include an anatomically correct stifle. Experimental testing was done in vitro on a canine hind limb using a bi-axial tester to move the limb through loading profiles and Optotrak system to collect the kinematics of the hind limb for these profiles. A model was built using bone geometries created from MRIs post processed using a polygon smoothing software and scaled parameters for connective tissues and joints. Two profiles were selected for modeling and comparison with the experimental kinematics; a loading approximating a squat and varus/valgus rotation originating at the hip. The model provides an acceptable approximation of hind limb kinematics validating the modeling techniques used.