Department of Rheumatology, University of Pittsburgh, Pittsburgh, United States.
Yukioka Hospital Hand Center, Osaka Yukioka College of Health Science, Yukioka, Japan.
Curr Rheumatol Rev. 2020;16(3):206-209. doi: 10.2174/1573397115666190115125430.
The purpose of this study was to investigate scaphoid motion within the scapho-trapezio-trapezoidal (STT) joint during wrist motion in the presence of STT joint osteoarthritis (OA).
We studied 11 wrists with STT OA and 5 normal wrists. Computed tomography (CT) images were acquired in five wrist positions (maximum active flexion, extension, radial deviation, ulnar deviation, and neutral position). The 3-dimensional surface models of the radius and scaphoid were constructed and the motion of scaphoid relative to the radius was calculated.
During wrist flexion/extension motion, the scaphoid rotated mostly in the flexion/extension plane. The angle tended to be smaller in STT OA than in normal. During wrist radioulnar deviation, the scaphoid was in an extended position in neutral wrist in STT OA. The motion of scaphoid in STT OA was divided into two types: a rigid type and mobile type. The mobile type rotated closer to the flexion/extension plane than the rigid type. Taking into account scaphoid motion during wrist movement before surgery may provide better results in the treatment of STT OA.
本研究旨在探讨腕关节 STT 关节骨关节炎（OA）时 STT 关节运动中舟骨的运动。
我们研究了 11 个腕部 STT OA 和 5 个正常腕部。在五个腕部位置（最大主动屈伸、桡偏、尺偏和中立位）采集 CT 图像。构建桡骨和舟骨的三维表面模型，并计算舟骨相对于桡骨的运动。
在腕关节屈伸运动中，舟骨主要在屈伸平面内旋转。STT OA 中的角度比正常情况下小。在腕关节桡偏尺偏运动中，STT OA 中立位舟骨处于伸展位。舟骨在 STT OA 中的运动可分为刚性型和活动型。活动型比刚性型更接近屈伸平面旋转。考虑到术前腕关节运动时舟骨的运动，可能会为 STT OA 的治疗提供更好的结果。
