Department of Orthopedic Surgery, Yonsei University Wonju College of Medicine, Wonju, Korea.
Clin Orthop Surg. 2021 Sep;13(3):376-384. doi: 10.4055/cios20238. Epub 2021 Aug 17.
Many researchers have questioned whether shoulder kinematics such as the glenohumeral position and scapular kinematics would be different in different age groups. However, studies comparing shoulder kinematics between different age groups have been rare. The aim of this study was to analyze and compare the three-dimensional (3D) glenohumeral position, scapular kinematics, and scapulohumeral rhythm (SHR) during scapular plane arm abduction between a normal young male group and a normal older male group.
Twenty normal men (10 young and 10 older) were enrolled in this controlled laboratory study. Fluoroscopic images were obtained using a single plane X-ray system. Bilateral computed tomography scans were taken to create a 3D model. A 3D-2D registration technique was used to determine the 3D position and orientation of the bones of the shoulder.
During scapular plane arm abduction, there were significant differences in scapular kinematics between the groups. The older male group showed more upward rotation, posterior tilt, and external rotation than the young male group. On the other hand, the glenohumeral position such as superior inferior translation, anterior posterior translation, and external rotation of the humeral head did not show significant difference between the groups. The mean value of SHR for the overall arm elevation range from start to maximum elevation angle for the older group and young group was 2.298 ± 0.964 and 2.622 ± 0.931, respectively, showing a significant difference between the two groups ( = 0.035).
Scapular kinematics and SHR were significantly different between the older male group and the young male group. Our study could provide reference values of shoulder kinematics for older men aged 55-65 years.
许多研究人员质疑不同年龄组的肩部运动学（如盂肱关节位置和肩胛骨运动学）是否会有所不同。然而，比较不同年龄组肩部运动学的研究很少。本研究旨在分析和比较正常年轻男性组和正常老年男性组在肩胛骨平面臂外展过程中的三维（3D）盂肱关节位置、肩胛骨运动学和肩胛骨-肱骨节律（SHR）。
本对照实验室研究纳入 20 名正常男性（10 名年轻男性和 10 名老年男性）。使用单平面 X 射线系统获取透视图像。进行双侧计算机断层扫描以创建 3D 模型。使用 3D-2D 配准技术确定肩部骨骼的 3D 位置和方向。
在肩胛骨平面臂外展过程中，两组之间的肩胛骨运动学存在显著差异。老年男性组的肩胛骨旋转、后倾和外旋程度均高于年轻男性组。另一方面，盂肱关节位置（如肱骨头的上下平移、前后平移和外旋）在两组之间没有显著差异。从起始到最大抬高角度的整个手臂抬高范围内，老年组和年轻组的 SHR 的平均值分别为 2.298 ± 0.964 和 2.622 ± 0.931，两组之间存在显著差异（= 0.035）。
老年男性组和年轻男性组之间的肩胛骨运动学和 SHR 存在显著差异。我们的研究可为 55-65 岁老年男性的肩部运动学提供参考值。
