Bessho Yuki, Nakamura Toshiyasu, Nishiwaki Masao, Nagura Takeo, Matsumoto Morio, Nakamura Masaya, Sato Kazuki
1 Department of Orthopaedic Surgery, Keio University, Tokyo, Japan.
2 Clinical Research Center, International University of Health and Welfare, Tokyo, Japan.
J Hand Surg Eur Vol. 2018 Nov;43(9):967-973. doi: 10.1177/1753193418761266. Epub 2018 Mar 7.
We investigated the relationship between the radial inclination of the distal radius and distal radioulnar joint stability. Six fresh-frozen upper extremities were used. Radial inclination was decreased by 10° and 20° and increased by 10° from the original radial inclination. Distal radioulnar joint stiffness was assessed with an intact radioulnar ligament and after partial and then complete sectioning of the radioulnar ligament. Radial angulation deformities significantly increased distal radioulnar joint stiffness when the radioulnar ligament is totally or partially attached to the ulnar fovea. After complete sectioning of the radioulnar ligament, distal radioulnar joint stiffness decreased significantly; additional radial angulation deformity slightly increased distal radioulnar joint stiffness, but the distal radioulnar joint never recovered to the original stiffness. Based on the results, radial angulation deformities of the distal radius should be corrected within 10° when the radioulnar ligament is intact, to reduce the risk of symptomatic distal radioulnar joint instability.
我们研究了桡骨远端的桡偏角与桡尺远侧关节稳定性之间的关系。使用了六个新鲜冷冻的上肢。桡偏角从原始桡偏角减小10°和20°，并增加10°。在桡尺韧带完整时、部分切断然后完全切断桡尺韧带后，评估桡尺远侧关节的刚度。当桡尺韧带完全或部分附着于尺骨凹时，桡骨成角畸形会显著增加桡尺远侧关节的刚度。在完全切断桡尺韧带后，桡尺远侧关节的刚度显著降低；额外的桡骨成角畸形会轻微增加桡尺远侧关节的刚度，但桡尺远侧关节从未恢复到原始刚度。基于这些结果，当桡尺韧带完整时，桡骨远端的桡骨成角畸形应在10°以内得到纠正，以降低出现症状性桡尺远侧关节不稳定的风险。
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