【摘要】 目的比较胫骨近端内侧LCP接骨板通过锁定孔和加压孔固定在不同载荷下的应力分布特点,探讨锁定固定和加压固定的优缺点。方法建立胫骨近端骨折LCP接骨板锁定固定和加压固定的三维有限元模型,采用有限元分析法,分析模型在轴向加压、三点侧弯、扭转状态下的应力分布。结果①LCP接骨板在锁定固定和加压固定下,都在骨折处和骨折近端第一个锁定(加压)孔处有应力集中现象;②LCP接骨板锁定固定应力均值大于加压固定。结论锁定固定和加压固定都使钢板在骨折处和接骨板第一个锁定(加压)孔处容易发生断裂,加压固定比锁定固定更稳固,但锁定固定更符合BO理论要求。更多还原

【Abstract】 Objective To study the advantages and disadvantages of the compression fixation and the locked fixation by comparing the stress distribution of proximal medial tibial LCP plate fixed in compression hole and lock hole.Methods The 3D finite element model of the proximal tibial fractures by LCP plate fixed in compression hole and lock hole was established.The finite element analysis was used to analyze the stress distribution of model in the state of axial compression,three bends plus and rotating.Results ①There was concentration of stress in the fracture and the first pressure hole of the LCP plate.②The average stress of LCP plate lock fixation was higher than the compression fixation.Conclusion The plate is easily fractured in the first compression hole for both the compression fixation and the lock fixation.The compression fixation is more solid than the lock fixation,but the lock fixation meets the requirements of BO theory.更多还原