Rohwedder Thomas, Fischer Martin, Böttcher Peter
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.
Open Vet J. 2017;7(3):221-228. doi: 10.4314/ovj.v7i3.4. Epub 2017 Jul 23.
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.
本研究的目的是在一项前瞻性体内研究设计中，比较健康犬和发育异常犬的犬肘关节动态桡尺骨不匹配（dRUI）情况。在6个健康的肘关节（5只犬，中位年龄17个月，平均体重27.9千克）和7个患有内侧冠状突疾病的肘关节（6只犬，中位年龄17.5个月，平均体重27.6千克）中，通过手术将直径0.8毫米的钽珠植入桡骨、尺骨和肱骨，以便在犬在跑步机上行走时，使用高速双平面荧光透视进行动态放射立体测量分析（RSA）。测量站立期前三分之一阶段桡骨相对于尺骨的近远侧平移形式的dRUI，并使用非配对t检验在组间进行比较。健康肘关节的桡尺骨相对平移为0.7毫米（标准差0.31毫米），而发育异常的关节平移为0.5毫米（标准差0.30毫米）。未检测到组间有显著差异（p = 0.2092，置信区间-0.6 - 0.2）。基于这些发现，dRUI作为生理运动模式的一部分存在于每个犬肘关节中。然而，发育异常的肘关节并未显示出桡尺骨平移增加，因此dRUI不能被认为是内侧冠状突疾病的病因。
