【摘要】 [目的]探讨人体胫骨在静力载荷与冲击载荷作用下发生胫骨骨折的区别。[方法] 20个新鲜人体胫骨标本，随机分为两组，每组10个，左侧和右侧各5个，分别施加静力轴向载荷与动态冲击装置轴向载荷，测量其力学参数。[结果]静力学对照组10个标本的测试表明左侧胫骨的屈服载荷、屈服位移、极限载荷、极限位移均显著大于右侧（P<0.05）。动力冲击组10个标本在冲击速度为2.5 m/s，冲击高度32 cm，落锤重量40 kg的冲击下测试结果表明，左右两侧胫骨标本在动态冲击试验的加速度、冲击极限载荷、动态变形和载荷作用时间脉宽的差异均无统计学意义（P>0.05）。两种加载试验相比较，动态冲击力作用下的胫骨极限载荷显著大于静态极限载荷（P<0.05），动态冲击力作用下的胫骨动态形变大于静态极限位移（P<0.05）。[结论]与静态轴向载荷相比，胫骨标本在动态冲击载荷状态下的极限载荷和极限位移均显著增加。更多还原

【Abstract】 [Objective] To explore the biomechanical difference of human tibial fracture under static loading and impact loading.[Methods] Twenty fresh human tibia specimens were randomly divided into two groups, with 10 tibia in each group, 5 of the left side and 5of the right side. Static axial loading and dynamic impact axial loading were applied respectively to measure the mechanical parameters.[Results] As result of static test, the yield load, yield displacement, ultimate load and ultimate displacement of the left tibia were significantly higher than those of the right tibia(P<0.05). However, in the dynamic impact group, 10 specimens were tested at impact velocity of 2.5m/s, impact height of 32 cm, and drop weight of 40 kg, and the results showed that there were no significant differences in acceleration, impacting extreme load, dynamic deformation and load time pulse width between the left and right tibia specimens in dynamic impact test(P>0.05). In term of comparison of two loading state, the dynamic impacting loading had significantly greater ultimate load than the static loading(P<0.05), similarly, the dynamic impacting loading got significantly greater displacement than the static loading(P<0.05). [Conclusion] Compared with the static axial loading, the dynamic impact loading has significantly greater ultimate load and ultimate displacement of tibia specimens.更多还原