Cunningham J L, Evans M, Kenwright J
Oxford Orthopaedic Engineering Centre, University of Oxford, UK.
J Biomed Eng. 1989 Mar;11(2):118-22. doi: 10.1016/0141-5425(89)90120-9.
Axial movement occurring at the fracture site has been determined in a group of healing tibial fractures treated by external skeletal fixation. Fracture movement was determined via a strain gauge transducer which was attached to the column of the external fixator and measured the deflection of the bone screw adjacent to the fracture site and the active loading or weight bearing given by the patient to the fractured limb was monitored using a force platform. The results for 27 subjects show that, with a rigid unilateral fixator, the axial movement occurring at the fracture site was initially small (mean = 0.28 mm at 5 weeks post fracture). This movement increases to reach a mean maximum value of 0.43 mm at 11 weeks post-fracture and then decreases, despite increased weight bearing, as fracture healing progresses. In the early stages of healing, the movement can be increased slightly if the fixator is fitted with a module which permits additional fracture site movement, although the resultant increase in movement is only a small proportion of the potential available with this module.
在一组采用外固定架治疗的胫骨骨折愈合病例中，已测定了骨折部位的轴向移动情况。骨折移动通过附着在外固定架支柱上的应变片传感器测定，该传感器测量骨折部位附近骨螺钉的偏移量，并用测力平台监测患者施加在骨折肢体上的主动负荷或负重情况。27名受试者的结果显示，使用单侧刚性固定架时，骨折部位的轴向移动最初较小（骨折后5周时平均为0.28毫米）。该移动量在骨折后11周时增加至平均最大值0.43毫米，随后尽管负重增加，但随着骨折愈合进展而减小。在愈合早期，如果固定架安装了允许骨折部位有额外移动的模块，移动量可稍有增加，不过移动量的增加幅度仅占该模块潜在移动量的一小部分。
