Tolat A R, Stanley J K, Trail I A
Wrightington Hospital for Joint Diseases, Appley Bridge, UK.
J Hand Surg Br. 1996 Oct;21(5):587-94. doi: 10.1016/s0266-7681(96)80136-7.
Fifty preserved cadaver wrist specimens were studied. The anatomy of the distal radioulnar joint is complex, with varying configurations in the transverse and midcoronal planes. There is disparity in the radii of curvature of the sigmoid notch and the ulna-articular surface in the transverse plane, with resultant articular incongruity. Motion at the distal radioulnar joint is, hence, likely to be a combination of sliding and rotation with a small area of true appositional contact. The palmar osteocartilaginous lip of the sigmoid notch, along with the interosseous membrane, may be of importance in distal radioulnar stability. Palmar and dorsal radioulnar ligaments may act as "check-rein" ligaments, especially when seen with the "flat face" (type A) sigmoid notch.
对50个保存的尸体腕关节标本进行了研究。桡尺远侧关节的解剖结构复杂，在横平面和中冠状面有不同的形态。在横平面上，乙状切迹和尺骨关节面的曲率半径存在差异，导致关节不匹配。因此，桡尺远侧关节的运动可能是滑动和旋转的组合，真正对位接触的面积较小。乙状切迹的掌侧骨软骨唇以及骨间膜可能对桡尺远侧关节的稳定性很重要。掌侧和背侧桡尺韧带可能起到“控制”韧带的作用，尤其是在“平面”（A型）乙状切迹的情况下。
