3种固定器在治疗Lisfranc损伤中的生物力学比较与分析

doi:10.13418/j.issn.1001-165x.2018.02.019

Abstract

Abstract:

Objective　To evaluate the stability of new Ni-Ti memory alloy four-corner fixator in treatment of Lisfranc injuries and conduct comparative analysis with dorsal plate and transarticular screw fixation.　Methods　6 sides of lower limbs from fresh adult cadavers were chosen to test static rigidity under the condition of 600Naxial load by ElectroForce® 3510 system. Groups were set : (A) Control, Undamaged group ; (B) Damaged group without treatment ; (C) Damaged group fixed by new Ni-Ti memory alloy four-corner fixator ; (D) Damaged group fixed by dorsal Plate ; (E) Damaged group fixed by transarticular screw fixation. Group B , C and D were cyclically loaded at 5 Hz between 200 and 600 N for 3000 cycles to test the change of immediate stabilization and fatigue stabilization.　Results　Paired t test was applied to analyze the difference of each group themselves after fatigue , which turned out to be of no statistically significance (P＞0.05) . Integral rigidity in group B was less than that in group A (P＜0.05) . There was no significant difference among Group A , C and D (P＞0.05) , but their integral rigidity were less than that of group E (P＜0.05).　Conclusion　New Ni-Ti memory alloy four-corner fixator could provide significant fixation strength for the treatment of Lisfranc injuries , which lays the foundation for its clinical use.

Key words: , Ni-Ti memory alloy, 　Four-corner fixator, 　Lisfranc injuries, 　Biomechanics

LIU Shuai, XU Yong-qing, ZHANG Xu-lin, SUN Pei-dong, LIANG Dong-zhu . Biomechanical comparison and analysis of three kinds of fixators in the treatment of Lisfranc injuries[J]. Chinese Journal Of Clinical Anatomy, 2018, 36(2): 215-220.

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Biomechanical comparison and analysis of three kinds of fixators in the treatment of Lisfranc injuries

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