环抱锁定接骨板系统固定Vancouver B1型股骨假体周围骨折的生物力学实验研究  

Fixation of Vancouver type B1 periprosthetic femur fractures with a self-developed crossed-hug locking plate system:a biomechanical study

作　　者：储小兵[1] 金敏伟 董睿 Chu Xiaobing;Jin Minwei;Dong Rui(Department of Orthopaedics,The First Affiliated Hospital of Zhejiang Chinese Medical University(Zhejiang Provincial Hospital of Chinese Medicine),Hangzhou 310006,China)

机构地区：[1]浙江中医药大学附属第一医院(浙江省中医院)骨科,杭州310006

出　　处：《中华创伤骨科杂志》2024年第6期533-537,共5页Chinese Journal of Orthopaedic Trauma

基　　金：浙江省卫健委项目(2021PY055)。

摘　　要：目的:探讨自主研发的环抱锁定接骨板系统固定Vancouver B1型股骨假体周围骨折的生物力学性能。方法:取美国Sawbone公司生产的成人股骨假骨材料3根,其中3403型号2根、3447型号1根。模拟Vancouver B1型股骨假体周围骨折,然后应用自主研发的环抱锁定接骨板系统固定。在力学实验机上,模拟人体直立状态下的力学负载状态,顺序进行压缩试验(加载力为50~500 N,位移控制加速度为5 mm/min)、压缩疲劳试验(加载条件为50~500 N正弦波力值,频率为5 Hz,循环加载250次)、扭转试验(1°/min~15°/min的扭角加速度顺时针转动加载扭矩)及扭转破坏试验等。结果:压缩试验结果显示:样本1、样本2及样本3的位移分别为0.83、0.45、0.41 mm,所有样本的环抱锁定接骨板系统无异常变化。压缩疲劳试验结果显示:样本1、样本2及样本3的位移分别为(0.70±0.05)、(0.44±0.01)、(0.42±0.02)mm,最大位移变化<0.13 mm,所有样本的环抱锁定接骨板系统无异常变化。扭转试验中4°内扭转结果:样本1、样本2及样本3的最大扭矩分别为4.73、7.82、7.37 N·m。扭转破坏试验中样本1在股骨远端接骨板的第一个螺钉处发生骨折断裂,极限扭矩为28.18 N·m;样本2抱钩开始滑动的扭矩为16.00 N·m,抱钩断裂内固定失效的极限扭矩为18.74 N·m;样本3抱钩开始滑动的扭矩为20.49 N·m,抱钩断裂内固定失效的极限扭矩为24.82 N·m。结论:自主研发的Vancouver B1型股骨假体周围骨折环抱锁定接骨板系统在仿真Sawbone假骨模型模拟人体直立负重的力学测试中达到了所需的力学强度。ObjectiveTo investigate the biomechanical properties of a self-developed crossed-hug locking plate system in fixation of Vancouver type B1 periprosthetic femur fractures.MethodsVancouver type B1 periprosthetic femur fractures in clinic were simulated in 3 samples of artificial adult femur produced by Sawbone corporation in USA,including 2 of model 3403 and 1 of model 3447.The fractures were then fixed with our self-developed crossed-hug locking plate system.After the load state of the human body in the upright stance was simulated on an experimental machine,compression tests(with a loading force of 50 to 500 N,and a displacement controlled acceleration of 5 mm/min),compression fatigue tests(with a loading condition of 50 to 500 N sine wave force value,a frequency of 5 Hz,and cyclic loading of 250 times),torsion tests(torque loaded at an torque angle acceleration of 1°/min to 15°/min in clockwise rotation),and torsion failure tests were conducted in sequence.ResultsThe axial compression tests showed that the displacements in the 3 samples were 0.83 mm,0.45 mm and 0.41 mm,respectively,leading to no abnormal changes in the crossed-hug locking plate system in all samples.The compressive fatigue tests showed that the displacements in the 3 samples were(0.70±0.05)mm,(0.44±0.01)mm,and(0.42±0.02)mm,respectively,with the maximum displacement change less than 0.13 mm,leading to no abnormal changes in the crossed-hug locking plate system in all samples.The torsion within 4°in the torsion test showed that the maximum torque was 4.73 N·m in sample 1,7.82 N·m in sample 2,and 7.37 N·m in sample 3.In the torsion failure tests,sample 1 was fractured at the first screw in the distal femoral bone plate,with an ultimate torque of 28.18 N·m.In sample 2,the torque at which the hook started to slide was 16.00 N·m,and the ultimate torque at which the hook broke to cause internal fixation failure was 18.74 N·m.The torque at which the hook started to slide in sample 3 was 20.49 N·m,and the ultimate torque at which the hook br

关 键 词：股骨骨折 内固定器 生物力学 假体周围骨折 环抱锁定接骨板 

分 类 号：R687.3[医药卫生—骨科学]