Large Animal Veterinary Medicine, University of Florida, Gainesville, FL.
Mechanical and Aerospace Engineering, University of Florida, Gainesville, FL.
Am J Vet Res. 2023 Jan 2;84(2):ajvr.22.10.0171. doi: 10.2460/ajvr.22.10.0171.
This study aims to quantitatively characterize the passive kinematics of the healthy, soft tissue-intact equine stifle to establish an objective foundation for providing insights into the etiology of stifle disorders and developing a possible surgical treatment for stifle degenerative disease.
5 whole-horse specimens.
Reflective markers with intracortical bone pins and a motion capture system were used to investigate the stifle joint kinematics. Kinematics of 5 whole-horse specimens euthanized within 2 hours were calculated for internal/external rotation, adduction/abduction, and cranial/caudal translation of the medial and lateral femoral condyles and estimated joint contact centroids as functions of joint extension angle.
From 41.7° to 121.6° (mean ± SD, range of motion: 107.5° ± 7.2°) of joint extension, 13° ± 3.7° of tibial external rotation and 6° ± 2.7° of adduction were observed. The lateral femoral condyle demonstrated significantly greater cranial translation than the medial during extension (23.7 mm ± 9.3 mm vs. 14.3 mm ± 7.0 mm, P = .01). No significant difference was found between the cranial/caudal translation of estimated joint contact centroids in the medial and lateral compartment (13.3 mm ± 7.7 mm vs. 16.4 mm ± 5.8 mm, P = .16).
The findings share similarities with kinematics for human knees and sheep and dog stifles, suggesting it may be possible to translate what has been learned in human arthroplasty to treatment for equine stifles.
本研究旨在定量描述健康、软组织完整的马膝关节的被动运动学，为深入了解膝关节疾病的病因以及为退行性膝关节疾病开发可能的手术治疗方法提供客观依据。
5 匹全马标本。
使用带皮质骨钉的反光标记物和运动捕捉系统来研究膝关节运动学。对 5 匹在死后 2 小时内处死的全马标本的运动学进行了计算，以获得内侧和外侧股骨髁的内外旋转、内收/外展以及头侧/尾侧平移，并作为关节伸展角度的函数来估计关节接触中心点。
从 41.7°到 121.6°（平均值±标准差，运动范围：107.5°±7.2°）的关节伸展中，观察到 13°±3.7°的胫骨外旋和 6°±2.7°的内收。在伸展过程中，外侧股骨髁的头侧平移明显大于内侧（23.7 mm±9.3 mm 比 14.3 mm±7.0 mm，P=0.01）。内侧和外侧间室的估计关节接触中心点的头侧/尾侧平移无显著差异（13.3 mm±7.7 mm 比 16.4 mm±5.8 mm，P=0.16）。
这些发现与人类膝关节和绵羊、狗膝关节的运动学相似，这表明可能可以将人类关节置换术中的经验应用于马膝关节的治疗。
