Richardson J B, Gardner T N, Hardy J R, Evans M, Kuiper J H, Kenwright J
Glenfield General Hospital, Leicester, UK.
J Bone Joint Surg Br. 1995 May;77(3):412-6.
We studied the effect of 'dynamisation' on tibial fractures in six patients treated by the Dynamic Axial Fixator. In the early stages, peak cyclic movement at two to four weeks averaged 0.75 mm (0.19 to 1.02) on the medial side of the bone and 0.86 mm (0.21 to 1.25) on the lateral side. The amount of movement correlated with the applied load and the fracture stiffness. After unlocking the fixator column at six weeks, progressive closure of the gap averaged 1.3 mm (0.1 to 3.5). Cyclic movement is produced by early weight-bearing with the fixator column locked. Progressive closure occurs after unlocking the column, and is often associated with a reduction in cyclic movements. The effects of dynamisation on movement at the fracture site should be defined separately, in terms of cyclic movement and of progressive closure.
我们研究了“动力化”对6例采用动力轴向固定器治疗的胫骨骨折患者的影响。在早期，两到四周时的峰值循环移动在内侧平均为0.75毫米（0.19至1.02），在外侧平均为0.86毫米（0.21至1.25）。移动量与施加的载荷及骨折刚度相关。六周时解锁固定器柱后，间隙的逐渐闭合平均为1.3毫米（0.1至3.5）。循环移动是通过锁定固定器柱时早期负重产生的。解锁柱后会发生逐渐闭合，且常伴有循环移动的减少。动力化对骨折部位移动的影响应分别从循环移动和逐渐闭合方面进行界定。
