Ozaki J
Department of Orthopaedic Surgery, Nara Medical University, Japan.
Clin Orthop Relat Res. 1989 Jan(238):107-11.
The glenohumeral movements of the involuntary inferior and multidirectional instability were studied by means of cineradiography. Using the devised two parameters, i.e., the shoulder center edge and glenoid angles, the author compared the glenohumeral movements of the normal shoulder with the involuntary inferior and multidirectional instability of the shoulder. The glenohumeral movements of the involuntary inferior and multidirectional instability showed not only an excessive excursion and sliding motion but also a deterioration of the scapular abduction and external rotation, with the arm progressively abducted. These phenomena were especially remarkable at the maximum elevation of the arm. The roentgenogram of the overhead view of the shoulder joint indicates whether or not there is an involuntary inferior and multidirectional instability, and whether or not these parameters can be useful for diagnosis of shoulder lesions.
通过动态X线摄影术研究了非自主性下向和多方向不稳定的盂肱关节运动。作者使用设计的两个参数，即肩中心边缘角和肩胛盂角，比较了正常肩部的盂肱关节运动与肩部非自主性下向和多方向不稳定的情况。非自主性下向和多方向不稳定的盂肱关节运动不仅表现为过度的偏移和滑动，而且随着手臂逐渐外展，肩胛外展和外旋也会恶化。这些现象在手臂最大抬高时尤为明显。肩关节的头顶位X线片可显示是否存在非自主性下向和多方向不稳定，以及这些参数是否有助于肩部病变的诊断。
