Open Veterinary Journal

Peer-Reviewed Journal

In vivo fluoroscopic kinematography of dynamic radio-ulnar incongruence in dogs


Thomas Rohwedder(1,*), Martin Fischer(2) and Peter Böttcher(1)


Department of Small Animal Medicine, University of Leipzig, An den Tierkliniken 23, 04103 Leipzig, Germany

Institute of Systematic Zoology and Evolutionary Biology with Phyletic Museum, Friedrich-Schiller-University, Jena, Germany

________________________________________________________________________________________________________________________

Abstract

Aim of the study was to investigate dynamic radio-ulnar incongruence (dRUI) in the canine elbow joint comparing orthopedic healthy and dysplastic dogs in a prospective in vivo study design. In 6 orthopedic sound elbow joints (5 dogs, median age 17 months & mean body weight 27.9 kg) and 7 elbow joints with medial coronoid disease (6 dogs, median age 17.5 months & mean body weight 27.6 kg) 0.8 mm Ø tantalum beads were surgically implanted into radius, ulna and humerus for dynamic radiosteriometric analysis (RSA) using high-speed biplanar fluoroscopy with the dogs walking on a treadmill. dRUI, in the form of proximo-distal translation of the radius relative to the ulna, was measured for the first third of stance phase and compared between groups using unpaired t-testing. Healthy elbow joints exhibited a relative radio-ulnar translation of 0.7 mm (SD 0.31 mm), while dysplastic joints showed a translation of 0.5 mm (SD 0.30 mm). No significant difference between groups was detected (p = 0.2092, confidence interval -0.6 – 0.2). Based on these findings dRUI is present in every canine elbow joint, as part of the physiological kinematic pattern. However, dysplastic elbow joints do not show an increased radio-ulnar translation, and therfore dRUI cannot be considered causative for medial coronoid disease.

Keywords: Canine, Elbow dysplasia, Fluoroscopy, Gait analysis, Radio-ulnar incongruence.

________________________________________________________________________________________________________________________

Cite this paper:

Rohwedder, T., Fischer, M. and Böttcher, P. 2017.  In vivo fluoroscopic kinematography of dynamic radio-ulnar incongruence in dogs. Open Vet. J. 7(3), 221-228.