Measurement of the Glenoid Track In Vivo as Investigated by 3-Dimensional Motion Analysis Using Open MRI
Measurement of the Glenoid Track In Vivo as Investigated by 3-Dimensional Motion Analysis Using Open MRI
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DOI：
10.1177/0363546514527406
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发表时间：
2014-06-01
影响因子：
4.8
通讯作者：
Itoi, Eiji
中科院分区：
文献类型：
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作者：
Omori, Yasushi;Yamamoto, Nobuyuki;Itoi, Eiji
背景资料：Hill-Sachs病变是与前盂肱关节不稳定相关的常见损伤，与前盂缘接合的Hill-Sachs病变是与复发性不稳定相关的1个因素。在2007年的一项尸体研究中，提出了一个新的概念，即“关节盂轨迹”，用于评估Hill-Sachs病变与关节盂接合的风险。目的：使用定制开发的无创运动分析系统研究体内关节盂轨迹。研究设计：描述性实验室研究。方法：使用宽机架磁共振成像（MRI）扫描仪，对30名健康志愿者的右肩进行了检查。在从0度到最大外展的7个静态仰卧位对右臂进行MRI扫描，保持最大外旋和水平伸展。使用自定义运动分析系统，根据MRI数据创建肩胛骨和肱骨的三维模型。然后，肱骨和肩胛骨的运动进行计算，使用基于体素的注册每个模型，并在肱骨头上的关节盂的运动进行了analysed.Results：模型表明，关节盂接触转移从下内侧到肱骨头的上外侧部分。手臂外展60度、90度、120度和150度时，关节盂轨道的平均宽度分别为20.7 +/- 4.5 mm、19.4 +/- 3.9 mm、18.9 +/- 2.7 mm和18.7 +/- 2.5 mm（关节盂宽度的89%、83%、82%和81%）。外展60度时的关节盂轨迹宽度显著大于外展90度、120度和150度时的关节盂轨迹宽度（分别为P = 0.0472、0.0148和0.0083）。外展90 °、120 °和150 °时测量的关节盂沟宽度无显著性差异。结论：关节盂沟的存在及其宽度在活体中得到了证实。
Background: A Hill-Sachs lesion is a common injury associated with anterior glenohumeral instability, and a Hill-Sachs lesion that engages with the anterior glenoid rim is 1 factor related to recurrent instability. In a cadaveric study in 2007, a new concept, the "glenoid track," was proposed to evaluate the risk of engagement of Hill-Sachs lesions with the glenoid.Purpose: To investigate the glenoid track in vivo using a custom-developed noninvasive motion analysis system.Study Design: Descriptive laboratory study.Methods: Using a wide-gantry magnetic resonance imaging (MRI) scanner, the right shoulders of 30 healthy volunteers were examined. The MRI scans were taken of the right arm in 7 static supine positions from 0 degrees to maximum abduction, keeping maximum external rotation and horizontal extension. Using the custom motion analysis system, 3-dimensional models of the scapula and humerus were created from the MRI data. Then, the movement of the humerus and scapula was calculated using voxel-based registration of each model, and the motion of the glenoid on the humeral head was analyzed.Results: The models demonstrated that glenoid contact shifted from the inferomedial to the superolateral portion of the humeral head. The mean widths of the glenoid track with the arm at 60 degrees, 90 degrees, 120 degrees, and 150 degrees of abduction were 20.7 +/- 4.5 mm, 19.4 +/- 3.9 mm, 18.9 +/- 2.7 mm, and 18.7 +/- 2.5 mm (89%, 83%, 82%, and 81% of the glenoid width), respectively. The width of the glenoid track at 60 degrees of abduction was significantly greater than those at 90 degrees, 120 degrees, and 150 degrees of abduction (P = .0472, .0148, and .0083, respectively). There were no significant differences among widths measured at 90 degrees, 120 degrees, and 150 degrees of abduction.Conclusion: The existence and widths of the glenoid track were confirmed in vivo.