Kihara H, Short W H, Werner F W, Fortino M D, Palmer A K
Department of Orthopedic Surgery, SUNY Health Science Center 13210, USA.
J Hand Surg Am. 1995 Nov;20(6):930-6. doi: 10.1016/S0363-5023(05)80139-X.
A biomechanical cadaver study was performed to determine the roles of the stabilizing structures of the distal radioulnar joint during pronation and supination. Subluxation and dislocation of the radius with respect to the ulna were evaluated in seven cadaver forearms placed in supination, pronation, and neutral forearm rotation. The amount of subluxation was measured with all structures intact, and after sectioning in various sequences the dorsal and palmar radioulnar ligaments, the distal portion of the interosseous membrane including the pronator quadratus, and the entire interosseous membrane. After sectioning two of any four structures, the distal radioulnar joint remained stable. When the interosseous membrane was disrupted first, the dorsal radioulnar ligament was found to be more important than the palmar radioulnar ligament in stabilizing the distal radioulnar joint in pronation, and conversely the palmar radioulnar ligament was more important than the dorsal radioulnar ligament in supination. Dislocation, and frequently diastasis, occurred only with sectioning of all four structures. This suggests that all four structures contribute to stability of the distal radioulnar joint.
进行了一项生物力学尸体研究，以确定下尺桡关节稳定结构在旋前和旋后过程中的作用。在七具处于旋后、旋前和前臂中立旋转位的尸体前臂中，评估了桡骨相对于尺骨的半脱位和脱位情况。在所有结构完整时测量半脱位量，然后按不同顺序切断背侧和掌侧尺桡韧带、包括旋前方肌在内的骨间膜远端部分以及整个骨间膜后再次测量。切断四个结构中的任意两个后，下尺桡关节仍保持稳定。当首先切断骨间膜时，发现背侧尺桡韧带在旋前时稳定下尺桡关节方面比掌侧尺桡韧带更重要，相反，掌侧尺桡韧带在旋后时比背侧尺桡韧带更重要。仅在切断所有四个结构时才会发生脱位，且常常伴有分离。这表明所有四个结构都有助于下尺桡关节的稳定性。
