Moraiti Constantina, Klouche Shahnaz, Werthel Jean David, Bauer Thomas, Hardy Philippe
Ambroise Paré Hospital, 9, avenue Charles De Gaulle, 92104, Boulogne-Billancourt, France.
Int Orthop. 2017 May;41(5):1017-1022. doi: 10.1007/s00264-016-3290-4. Epub 2016 Oct 4.
To propose and to assess the reproducibility of a new method (GO [glenoid orientation] index) for the estimation of the glenoid orientation in relation to the anterior surface of the glenoid.
This is a retrospective study on computed tomography (CT) scan. The GO index was defined as the angle formed by a line perpendicular to the tangent to the anterior surface of the scapula and the glenoid line (which is defined as the line connecting the anterior and the posterior rim of the glenoid). The measurements were performed at the level of the glenoid where its diameter is the greatest. Two independent observers performed each measurement twice. The intra- and inter-observer reproducibility was evaluated by the Pearson coefficient (r) and the intra-class correlation coefficient (ρ, ICC). The correlation between GO index and glenoid version as described by Friedman was also studied.
Seventy-eight CT scans were analysed, 38 shoulders with glenohumeral arthritis and 40 healthy shoulders, 32 females/46 males, mean age 53.9 ± 22.7 years. The measures were all highly correlated (r > 0.50, p = 0.00001). The intra- and inter-observer reproducibility was good to excellent (0.71 < ρ < 0.84, p = 0.00001). GO index was 26.9 ± 6.3°, 28.4 ± 6° in the group with glenohumeral osteoarthritis and 25.5 ± 6.4° in the healthy group, p = 0.04. The glenoid version was -0.8 ± 7.9° in the group with glenohumeral osteoarthritis and -3.9 ± 6° in the healthy group, p = 0.05. No agreement was found between the glenoid version and GO index.
GO index is simple and reproducible. It could be very useful for the pre-operative planning and intra-operative positioning of the implants in total shoulder arthroplasty.
提出并评估一种用于估计肩胛盂相对于肩胛盂前表面方向的新方法（GO[肩胛盂方向]指数）的可重复性。
这是一项关于计算机断层扫描（CT）的回顾性研究。GO指数定义为垂直于肩胛盂前表面切线的直线与肩胛盂线（定义为连接肩胛盂前后缘的直线）所形成的角度。测量在肩胛盂直径最大的水平进行。两名独立观察者各进行两次测量。通过Pearson系数（r）和组内相关系数（ρ，ICC）评估观察者内和观察者间的可重复性。还研究了Friedman所描述的GO指数与肩胛盂版本之间的相关性。
分析了78例CT扫描，其中38例为肩肱关节炎患者的肩部，40例为健康肩部，女性32例/男性46例，平均年龄53.9±22.7岁。所有测量结果均高度相关（r＞0.50，p = 0.00001）。观察者内和观察者间的可重复性良好至优秀（0.71＜ρ＜0.84，p = 0.00001）。肩肱骨关节炎组的GO指数为26.9±6.3°，健康组为28.4±6°，p = 0.04。肩肱骨关节炎组的肩胛盂版本为-0.8±7.9°，健康组为-3.9±6°，p = 0.05。未发现肩胛盂版本与GO指数之间存在一致性。
GO指数简单且可重复。它对于全肩关节置换术中植入物的术前规划和术中定位可能非常有用。
