改进型耻骨联合分离记忆合金内固定器的 生物力学特性
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兰州市科技局人才创新创业项目(2017-RC-58)


Biomechanical Properties of the Modified Memory Alloy Internal Fixator for Separation of Pubic Symphysis
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    摘要:

    目的 探究改进型耻骨联合分离记忆合金内固定器生物力学特性。方法 采用10具骨盆标本,建立耻骨联合分离损伤模型,对照组复位后采用动力加压钢板固定,实验组复位后采用改进型耻骨联合分离记忆合金内固定器固定,比较两种内固定的生物力学稳定性。结果 两组模型均无松动,内固定无断裂。实验组耻骨联合在水平、前后、垂直3个方向的位移与对照组比较均明显减小(P<0.05)。结论 改进型耻骨联合分离记忆合金内固定器对抗水平和前后方向拉力以及垂直剪切力均优于动力加压钢板。

    Abstract:

    Objective To investigate biomechanical characteristics of the modified memory alloy internal fixator for separation of pubic symphysis. Methods The model of pubic symphysis separation injury was established based on 10 pelvic specimens. The control group was fixed with the dynamic compression plate after reduction, and the experimental group was fixed with the modified memory alloy internal fixator for separation of pubic symphysis after reduction. The biomechanical stability for two kinds of internal fixation was compared. Results There were no loosening and fracture of internal fixation in both groups. The displacement of pubic symphysis in horizontal, anterio-posterior and vertical direction in the experimental group was obviously reduced compared with the control group (P<0.05). Conclusions Compared with the dynamic compression plate, the modified memory alloy internal fixator for separation of pubic symphysis shows better resistance to the tensile force against horizontal and anterio-posterior direction, as well as better resistance to the vertical shear force.

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周君,宫玉锁,李盛华,朱艳国.改进型耻骨联合分离记忆合金内固定器的 生物力学特性[J].医用生物力学,2020,35(6):750-753

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  • 收稿日期:2019-12-30
  • 最后修改日期:2020-02-20
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  • 在线发布日期: 2020-12-24
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