Plastic, Reconstructive and Hand Surgery, University of Amsterdam, Amsterdam UMC, AMC, Amsterdam, Netherlands.
Biomedical Engineering and Physics, University of Amsterdam, Amsterdam UMC, AMC, Amsterdam, Netherlands.
J Hand Surg Eur Vol. 2019 Dec;44(10):1056-1064. doi: 10.1177/1753193419866598. Epub 2019 Aug 14.
The aim was to evaluate if motion between the scaphoid bone fragments is related to the position of the fracture line and if a scaphoid nonunion results in the uncoupling of the proximal and distal carpal row during wrist motion. The influence of dorsal intercalated segment instability on interfragmentary motion was also analysed. In this study, 12 patients were included with unilateral scaphoid nonunion. Four-dimensional computerized tomography was used to analyse flexion-extension and radioulnar deviation motion of both wrists. We found that an increased instability of the scaphoid fragments is associated with the presence of dorsal intercalated segment instability and is not dependent on the position of the fracture line relative to the scaphoid apex. Additionally, a scaphoid nonunion results in an uncoupling of the carpal rows.
目的在于评估舟状骨骨折块之间的运动是否与骨折线的位置有关，以及舟状骨骨不连是否会导致腕关节运动时近排腕骨和远排腕骨分离。本研究还分析了背侧间插段不稳对骨折块间运动的影响。本研究纳入了 12 例单侧舟状骨骨不连患者。使用四维计算机断层扫描分析双侧腕关节屈伸和桡尺偏运动。我们发现，舟状骨骨折块的不稳定性增加与背侧间插段不稳的存在有关，而与骨折线相对于舟状骨顶点的位置无关。此外，舟状骨骨不连会导致腕骨分离。
