外固定器背伸位固定治疗三踝骨折内踝顶针应变生物力学测试研究  

Biomechanics Study of Medial Malleolus Pin Straining in Trimalleolar Fracture treated by External Fixation in Dorsiflexion Position

作　　者：成永忠[1] 温建民[1] 常德有[1] 王雷[1] 张戈[2] 桑志成[1] 蒋科卫[1] 刘志成[3] 张昆亚[3] 

机构地区：[1]中国中医科学院望京医院骨伤中心创二科,北京100700 [2]唐山市第三医院 [3]首都医科大学生物工程学院

出　　处：《中国中医骨伤科杂志》2009年第5期1-3,共3页Chinese Journal of Traditional Medical Traumatology & Orthopedics

基　　金：中国中医科学院第三批优势病种项目

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。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 po- sition. Numerical data was gathered by deformeter when experimentation machine loaded. Results： Medial malleolus frac- ture 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.

关 键 词：外固定器 三踝骨折 生物力学 

分 类 号：R274.12[医药卫生—中医骨伤科学]