【摘要】 目的:探讨外固定器背伸位固定治疗三踝骨折时使内踝骨折稳定的最佳踝关节固定位置。方法:应用手术截骨方法制作三踝骨折的尸体标本模型。复位后安装外固定器,并应用6根顶针复位与固定。于内踝两根顶针下表面贴应变片,并与应变仪导线连接。通过调整踝关节固定复位器,使踝关节固定于背伸中立、背伸内翻、背伸外翻三种位置。用试验机控制加载,应用应变仪采集顶针应变数据。实验结果经SPSS12.0统计软件进行统计分析。结果:外内踝骨折背伸中立位比背伸内翻位及背伸外翻位固定稳定。结论:外固定器背伸位固定治疗三踝骨折时,使内踝骨折稳定的最佳踝关节固定位置是背伸中立位。更多还原

【Abstract】 Objective:To find out the best fixation position for ankles which will stabilize the medial malleolus in trimalleolar fractures treated by external fixation in dorsiflexion position.Methods:Cadaver models of trimalleolar fractures were made by operation.After the models were successfully set up,external fixation plus 6 pins were used for reduction and fixation.Straining flake was stuck to the pin surface below the medial malleolus,and then the straining flake was connected to leads of strain gauge.Ankle joint position was adjusted in three different dorsiflexion positions:neutral,varus and ecstrophy position.Numerical data was gathered by deformeter when experimentation machine loaded.Results:Medial malleolus fracture was more stable in dorsiflexion-neutral position than in dorsiflexion-varus position or dorsiflexion-ecstrophy position.Conclusion:Dorsiflexion-neutral position is the best position for stabilization of medial malleolus fracture when trimalleolar fractures are treated by external fixation is.更多还原