足底主要韧带损伤对足纵弓应力分布的影响  

Longitudinal arch stress distribution of the foot following plantar ligament injury

作　　者：杨云峰[1] 俞光荣[1] 周家钤[1] 陈雁西[1] 袁锋[1] 贾永伟[1] 牛文鑫[2] 丁祖泉[2] 

机构地区：[1]同济大学附属同济医院骨科,上海200065 [2]同济大学生命科学与技术学院生物医学工程研究所

出　　处：《中华创伤杂志》2008年第5期327-330,共4页Chinese Journal of Trauma

基　　金：国家自然科学基金资助项目（30640058）

摘　　要：目的 测量尸体足纵弓主要骨结构的应力分布，分析韧带损伤对其应力的影响。方法 7例正常成人新鲜尸体足标本，解剖显露足底跖筋膜、弹簧韧带、跖长韧带、跖短韧带，标记足纵弓主要骨结构。经电子万能试验机逐级加载至700N，利用静态电阻应变测试仪和微型箔式电阻应变片，测量足底韧带损伤情况下足纵弓骨结构的表面应力，对结果进行统计学分析。结果 在足底韧带损伤前，最大应力值出现在跟骨，其次是第三跖骨、第二跖骨，均为压应力；而舟骨、腓骨、胫骨主要表现为拉应力。不同足底韧带损伤情况下骨结构表面应力差异有统计学意义（P〈0．05）。结论 足底韧带损伤后，足纵弓骨结构的表面应力分布将发生改变。Objective To measure stress distribution of the main bone architecture of the normal adult cadaveric foot and discuss the effect of plantar ligament injury on stress distribution. Methods Seven fresh adult cadaveric feet were used and 10 strain gauges attached to the bones of the longitudinal foot arch, including the calcaneus, navicular, medial cuneiform,1-5 metatarsal tnmk,the distal part of the tibia and fibular, respectively. After the loading was added to 700 N by almighty test machine, resistance strainmeter was used to measure surface strain of these bones. The results were processed statistically. Results The strain was varied based on different bone segments attached and increased with loading. Tensile force was always found at the medial part of the navicular, the distal part of the tibia and fibular, while the others showed compression all the time. Peak strain was found at calcaneus, followed by the second and third metatarsal. Strain on the surface of the bone segments changed greatly with different ligament injury （ P 〈 0.05 ）. Conclusion The bone surface stress of the longitudinal foot arch changes significantly when the plantar ligament is injured.

关 键 词：足损伤 韧带 骨折 应力性 生物力学 足纵弓 

分 类 号：R686.5[医药卫生—骨科学] R783.6[医药卫生—外科学]