Dey Roopam, Roche Steven, Rosch Theo, Mutsvangwa Tinashe, Charilaou Johan, Sivarasu Sudesh
Department of Human Biology, University of Cape Town, Cape Town, South Africa.
Department of Orthopaedic Surgery, Groote Schuur Hospital, Cape Town, South Africa.
JSES Open Access. 2018 Feb 1;2(1):1-7. doi: 10.1016/j.jses.2017.11.007. eCollection 2018 Mar.
This study focused on the unique aspect of investigating shoulder morphometric differences between 2 distinct populations.
We used 90 computed tomography images of cadaveric shoulders for this study; 45 scans belonged to the South African (SA) cohort (49.74 ± 15.4 years) and the rest were Swiss (CH; 53.8 ± 21 years). The articulating surfaces of the glenohumeral joint were extracted, and their morphometric features, such as head circular diameter, glenoid and humeral head radius of curvature, head height, and humeral height, were measured.
The mean interpopulation difference in the circular diameter of the humerus was 2.0 mm ( = .017) and 1.86 mm ( > .05) in the anterior-posterior and superior-inferior directions, respectively. The difference in the radius of curvature between the populations was 1.17 mm ( = .037). The SA shoulders were found to be longer than the CH shoulders by 8.4 mm ( > .05). There was no significant difference in the glenoid radius of curvature. The SA shoulders had higher glenohumeral mismatch ( = .005) and lower conformity index ( = .001) in comparison to the CH shoulders.
This study presents anatomic differences between African and European glenohumeral articulating surfaces. The results suggest that the glenohumeral geometry is both gender and population specific, and future joint replacements may be designed to address these differences.
本研究聚焦于调查两个不同人群之间肩部形态测量差异这一独特方面。
我们在本研究中使用了90张尸体肩部的计算机断层扫描图像；45次扫描属于南非（SA）队列（49.74±15.4岁），其余为瑞士（CH；53.8±21岁）队列。提取了肱盂关节的关节面，并测量了其形态特征，如头部圆形直径、关节盂和肱骨头曲率半径、头部高度和肱骨高度。
肱骨圆形直径的平均群体间差异在前后方向为2.0毫米（P = 0.017），在上下方向为1.86毫米（P>0.05）。群体间曲率半径差异为1.17毫米（P = 0.037）。发现SA肩部比CH肩部长8.4毫米（P>0.05）。关节盂曲率半径无显著差异。与CH肩部相比，SA肩部的肱盂不匹配度更高（P = 0.005），一致性指数更低（P = 0.001）。
本研究呈现了非洲人和欧洲人肱盂关节面之间的解剖学差异。结果表明，肱盂几何形状具有性别和群体特异性，未来的关节置换可能需要针对这些差异进行设计。
