BMD of bone will directly affect the intensity (measured by pullout strength) of screw.
3、骨密度的大小直接影响螺钉内固定的强度(以拔出力的大小衡量)。
参考来源 - 椎弓根螺钉于骨矿量下降椎体中应用的研究Conclusion : The results demonstrated that augmentation pedicle screws fixation with nano bone putty or Bone Cementand mixture can increase the pull-out strength of thepedicle screws on osteoporotic, but the strength of nano bone putty is weak.
结论:纳米骨浆、骨水泥及二者混合强化能够增加骨质疏松椎弓根螺钉轴向拔出力,但纳米骨浆强化强度比骨水泥要弱。
参考来源 - 纳米骨浆强化骨质疏松椎弓根螺钉的生物力学研究Therefore,we have constructed a model of the outer cortical perforation after the screw placement,and studied the pull-out force and energy of pedicle screws with different plant depth(75% & 100%).
为此,我们构建了椎弓根螺钉固定后椎弓根外侧皮质破裂的模型,并以此模型测量了不同进钉深度(75%,100%)条件下的螺钉最大拔出力及拔出能量。
参考来源 - 椎弓根皮质破裂对椎弓根固定影响的生物力学研究③The shell also adopts large-end fiber in order to increase the pullout force, which enhances the fracture strength and fracture toughness of the shell.
③贝壳采用大端纤维来增加霰石片纤维的拔出力,从而显著增强材料的断裂韧性和断裂强度。
参考来源 - 双壳类贝壳微结构强韧机理研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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