af Ekenstam F, Hagert C G
Scand J Plast Reconstr Surg. 1985;19(1):17-25. doi: 10.3109/02844318509052861.
In fresh-frozen amputated- and cadaver arm specimens the anatomy and stability of the distal radio ulnar joint were investigated. The articulating surface of the sigmoid notch of the radius and the corresponding surface of the ulnar head facing the sigmoid notch were studied in transverse cryo sections. In each specimen the radius of the curvature of the sigmoid notch was 4-7 mm larger than that of the ulnar head and consequently pronation and supination are combined rotation-sliding movement in the distal radio ulnar joint. The radio ulnar ligament consists of a dorsal and a volar fibrous part, broadly attached to the distal rim of the sigmoid notch and converging towards the fovea of the ulnar head. The cartilaginous disc is centrally located between these fibrous strands. In neutral position the articulating surface of the sigmoid notch is optimally covering the articulating surface of the ulnar head. This contact area is gradually diminished during pronation-supination until only a marginal contact remains at the end of each movement. The distal radius is kept stable in pronation by the volar part and in supination by the dorsal part of the radio ulnar ligament.
在新鲜冷冻的截肢和尸体手臂标本中，研究了桡尺远侧关节的解剖结构和稳定性。在横向冷冻切片中研究了桡骨乙状切迹的关节面以及尺骨头面对乙状切迹的相应表面。在每个标本中，乙状切迹的曲率半径比尺骨头的曲率半径大4 - 7毫米，因此旋前和旋后是桡尺远侧关节中的旋转滑动复合运动。桡尺韧带由背侧和掌侧纤维部分组成，广泛附着于乙状切迹的远端边缘并向尺骨头的中央凹汇聚。软骨盘位于这些纤维束之间的中央位置。在中立位时，乙状切迹的关节面最佳地覆盖尺骨头的关节面。在旋前 - 旋后过程中，该接触面积逐渐减小，直到在每个运动结束时仅保留边缘接触。桡骨远端在旋前时由桡尺韧带的掌侧部分保持稳定，在旋后时由背侧部分保持稳定。
