Elbow Position Affects Distal Radioulnar Joint Kinematics
Elbow Position Affects Distal Radioulnar Joint Kinematics
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DOI：
10.1016/j.jhsa.2009.04.025
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发表时间：
2009-09-01
影响因子：
1.9
通讯作者：
Chen, Neal C.
中科院分区：
文献类型：
--
作者：
Fu, Eric;Li, Guoan;Chen, Neal C.
目的前臂旋后-旋前的体内和体外研究表明，肘关节屈曲可能会影响远端尺放射关节的运动学。本研究验证的基本假设是，在活体内，尺骨的变化随着肘关节的屈曲和前臂的旋转而变化，前臂旋转的弧线随着肘关节的屈曲而变化。方法采用计算机断层扫描、双正交透视和三维建模的方法，研究了5名健康受试者在前臂旋后旋前和肘关节屈曲(0度~90度)过程中尺骨尺运动学的变化。结果肘关节近侧移位最大，肘关节屈曲90度，手臂处于正中旋前。当手臂处于正中旋前时，肘关节屈曲0度时的桡骨平移显著大于肘关节屈曲45度时(0.82±0.59 mm vs0.65±-0.80 mm，F：4.49，后屈时：0.055；p=0.05)，肘关节后屈45度时，肘关节前移显著小于肘屈90度时(0.65±-0.80 mm比0.97±-0.35 mm，F：4.49，后屈时：0.048；p=0.05)。旋前中期的桡骨近端平移明显大于旋前时。肘关节屈曲0度或90度时，前臂处于旋后位置(女性：14.90，后屈位：
Purpose Previous in vivo and in vitro studies of forearm supination-pronation suggest that distal radioulnar joint kinematics may be affected by elbow flexion. The primary hypotheses tested by this study were that, in vivo, ulnar variance changes with elbow flexion and forearm rotation, and the arc of forearm rotation changes in relationship to elbow flexion.Methods Changes in radioulnar kinematics during forearm supination-pronation and elbow flexion (0 degrees to 90 degrees) were studied in 5 uninjured subjects using computed tomography, dual-orthogonal fluoroscopy, and 3-dimensionat modeling. Analysis of variance and post-hoc testing was performed.Results Proximal translation of the radius was greatest with the elbow flexed to 90 degrees with the arm in midpronation. With the arm in midpronation, the translation of the radius was significantly greater at 0 degrees versus 45 degrees of elbow flexion (0.82 +/- 0.59 mm vs 0.65 +/- 0.80 mm, F: 4.49, post hoc: 0.055; p = .05) and significantly smaller at 45 degrees versus 90 degrees of elbow flexion (0.65 +/- 0.80 mm vs 0.97 +/- 0.35 mm, F: 4.49, post hoc: 0.048; p = .05). Proximal translation of the radius in midpronation was significantly greater than when. the forearm was in a supinated position when the elbow was at 0 degrees or 90 degrees flexion (F: 14.90, post hoc: