改进型耻骨联合分离记忆合金内固定器生物力学初探
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甘肃省中医院

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《耻骨联合分离记忆合金生物力学研究及相关产品研发》兰州市科技局人才创新创业项目。项目编号:2017-RC-58。


A preliminary study on the biomechanics of the modified memory alloy internal fixator for separation of Pubic Symphysis
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Gansu Provincial Hospital of TCM

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    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 10具骨盆标本,建立耻骨联合分离损伤模型,对照组复位后动力加压钢板固定,观察组复位后改进型耻骨联合分离记忆合金内固定器固定,对两种内固定进行生物力学稳定性比较。结果 两组模型均无松动,内固定无断裂。观察组耻骨联合水平、前后、上下三个方向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及前后方向拉力优于动力加压钢板,对抗垂直剪切力优于动力加压钢板。

    Abstract:

    :Objective To investigate the biomechanical characteristics of the modified memory alloy internal fixator for separation of Pubic Symphysis.Method A model of Pubic Symphysis separation injury was established in 10 pelvic specimens,in which the control group was fixed with dynamic compression plate after reduction, the observation group, the modified memory alloy internal fixator for separation of Pubic Symphysis was used after reduction.The biomechanical stability of two kinds of internal fixation was compared.Results There was no loosening and fracture of internal fixation in both groups.The horizontal,anteroposterior,up and down displacement of Pubic Symphysis in the observation group were obviously reduced compared with the control group(P<0.05).Conclusions The tensile force of the modified memory alloy internal fixator for separation of Pubic Symphysis against horizontal and anteroposterior direction are better than that against dynamic compression plate, which resistance to vertical shear force is better than that of dynamic compression plate.

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  • 收稿日期:2019-12-30
  • 最后修改日期:2020-02-20
  • 录用日期:2020-02-21
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