Summary
Objectives: To determine if the use of a six degrees of freedom marker set would allow new kinematic
data of the canine thoracic limbs to be calculated. To identify any significant differences
in thoracic limb gait patterns in all planes of motion, between the normal canine
population and patients with confirmed medial coronoid disease (MCD).
Method: Two groups of dogs were selected representing the normal Labrador Retriever population
(n = 13) and Labrador Retrievers with confirmed MCD (n = 13). Normal dogs had “normal”
hip and elbow radiographic scores in line with the International Elbow Working Group
and British Veterinary Association guidelines. Medial coronoid disease was confirmed
using arthroscopy after kinematic analysis was performed with a six degrees of freedom
marker set.
Results: The diseased elbow was nine degrees more extended between 43%-55% of the gait cycle
and 16° more supinated prior, early during and after foot strike. The antebrachium
was nine degrees more supinated during foot strike and three degrees more abducted
during early stance. None of the other parameters were significantly different.
Clinical significance: The use of a six degrees of freedom marker set made it possible for the elbow and
antebrachium to be reliably tracked in more than one plane of motion. Significant
differences were identified between the normal canine population and those affected
by MCD. These data may help elucidate biomechanical factors contributing to aetiopathogenesis
of MCD.
Keywords
Canine - elbow - kinematic - three-dimensional - dysplasia