Campbell Maxwell, Schurmans Glenn, Suh Nina, Garvin Gregory, Lalone Emily
School of Mechanical and Materials Engineering, Western University, London, ON, Canada.
Roth|McFarlane Hand and Upper Limb Centre, St. Joseph's Health Care London, ON, Canada.
Hand (N Y). 2025 Sep;20(6):958-965. doi: 10.1177/15589447241255705. Epub 2024 May 30.
The objective of this study was to examine the effect of wrist rotation on the scapholunate interval in the posteroanterior radiograph and to identify radiographic landmarks on the posteroanterior projection that can be used to assess position.
Eleven healthy cadaveric wrists were radiographed in the neutral position and subsequently were rotated and imaged from 30° pronation to 30° supination in 10° intervals. At each interval, the scapholunate interval was measured as well as the following landmarks: (1) the visible perimeter of the base of the hook of the hamate; (2) the radial-ulnar distribution of the dorsal nonarticular surface of the distal third metacarpal head; (3) the radial-ulnar distribution of the pisiform about the longitudinal axis of the ulna; and (4) the overlap of the pisiform and triquetrum.
The scapholunate interval was largest in the neutral position and linearly decreased by 34% for every 10° of pronation and decreased nonlinearly by 86% after the first 10° of supination. The appearance of the distal third metacarpal head was shown to be sensitive to both pronation and supination. The perimeter of the hook of the hamate and the distribution of the pisiform compared to the ulna were both shown to be sensitive to supination, whereas overlap of the pisiform and triquetrum was not shown to be sensitive to either direction of rotation.
Our results highlight the significant effect of rotation on radiographic landmarks at the wrist, indicating that 10° of supination can drastically alter the developed radiograph.
本研究的目的是检查腕关节旋转对后前位X线片上舟月间隙的影响，并确定后前位投照上可用于评估位置的X线标志。
对11个健康尸体腕关节进行中立位X线摄影，随后以10°间隔从旋前30°至旋后30°进行旋转并成像。在每个间隔处，测量舟月间隙以及以下标志：（1）钩骨钩基部的可见周长；（2）远侧第三掌骨头背侧非关节面的桡尺侧分布；（3）豌豆骨围绕尺骨纵轴的桡尺侧分布；（4）豌豆骨与三角骨的重叠情况。
舟月间隙在中立位时最大，旋前每10°线性减小34%，旋后最初10°后非线性减小86%。远侧第三掌骨头的外观显示对旋前和旋后均敏感。钩骨钩的周长以及豌豆骨相对于尺骨的分布均显示对旋后敏感，而豌豆骨与三角骨的重叠未显示对任何一个旋转方向敏感。
我们的结果突出了旋转对腕关节X线标志的显著影响，表明10°的旋后可极大地改变所显影的X线片。
