Roidis Nikolaos, Stevanovic Milan, Martirosian Armen, Abbott Douglas D, McPherson Edward J, Itamura John M
Department of Orthopedic Surgery, Keck School of Medicine, University of Southern California, University Hospital, Los Angeles, USA.
J Shoulder Elbow Surg. 2003 Jul-Aug;12(4):380-4. doi: 10.1016/s1058-2746(02)86881-1.
Anteroposterior (AP) and lateral radiographs of 20 healthy volunteers' forearms were taken in three views (full supination, neutral rotation, and full pronation). Radial head maximum diameter and angular measurements between the axis of forearm rotation (AFR) and the radial neck axis (RNA) were made with digital calipers. Repeated-measures analysis of variance revealed a statistically significant difference between the three AP groups, with supination having the smallest values (P <.0001), but not for the lateral groups (P =.128). Comparison of the AFR-RNA angle between the AP supinated position and the three lateral views revealed a statistically significant difference among all of the pairs, with the AP supinated position having the smallest values. The RNA most closely approximated the AFR with the forearm in the supinated position. For best approximating the native AFR during radial head replacement, the cut should be made perpendicular to the neck axis with the elbow extended and the forearm in the supinated position.
对20名健康志愿者的前臂进行前后位（AP）和侧位X线摄影，共拍摄三个视角（完全旋后、中立旋转和完全旋前）。使用数字卡尺测量桡骨头最大直径以及前臂旋转轴（AFR）与桡骨颈轴（RNA）之间的角度。重复测量方差分析显示，三个AP组之间存在统计学显著差异，旋后位的值最小（P <.0001），但侧位组之间无差异（P =.128）。比较AP旋后位与三个侧位视角之间的AFR-RNA角度，所有配对之间均存在统计学显著差异，AP旋后位的值最小。前臂处于旋后位时，RNA最接近AFR。在进行桡骨头置换时，为了最佳地接近天然AFR，应在肘关节伸直且前臂处于旋后位的情况下，垂直于颈轴进行截骨。
