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Injury. 2023 Dec;54(12):111097. doi: 10.1016/j.injury.2023.111097

Mechanical behaviors of titanium, nickel-titanium, and stainless elastic intramedullary nail in fixation of tibial diaphyseal fractures

钛、镍钛和不锈钢弹性髓内钉固定治疗胫骨干骨折的力学行为研究 翻译改进

Yen-Nien Chen  1, Pei-Yuan Lee  2

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作者单位

  • 1 Department of Physical Therapy, Asia University, NO.500, Lioufeng Rd., Wufeng, Taichung 413305, Taiwan. Electronic address: Yennien.chen@gmail.com.
  • 2 Doctoral Program in Tissue Engineering and Regenerative Medicine, College of Medicine, National Chung Hsing University, Taichung, Taiwan; Department of Orthopaedic Surgery, Show Chwan Memorial Hospital, Changhua, Taiwan.
  • DOI: 10.1016/j.injury.2023.111097 PMID: 37845172

    摘要 Ai翻译

    Introduction: Elastic nails have been widely used in the diaphyseal fracture fixation of long bones in adolescents. However, high complication rates have been reported in cases involving weights exceeding 55 kg. The existing nails are fabricated with different metals in clinical settings; however, the effect of the materials on the mechanical responses of the fractured bone remains unclear. Hence, the present study is conducted to compare the mechanical responses of typically used metals, namely titanium, stainless, and nickel-titanium, for elastic nails in the fixation of tibial diaphyseal fractures.

    Material and methods: A sawbone tube is used to determine the contact force, which is developed after constraining the nail inside the narrow canal using different nail materials. Furthermore, a finite element (FE) model of the tibial diaphyseal fracture is developed to predict the fracture gap deformation based on different nail materials under axial compression and bending loads. The push-out force in the FE simulation is compared with that of a case without an end cap.

    Results: In the sawbone tube, the results indicate that the contact force developed by the titanium nail is significantly higher than those developed by stainless and nickel-titanium nails. The contact forces developed by the titanium, stainless steel, and nickel- titanium nails are 385 (SD 34), 358 (SD 49), and 258 (SD 42) N, respectively. In the FE simulation, the titanium nail yields the highest push-out force when an end cap is not used, and the push-out forces in axial compression are 201, 183, and 87 N in the titanium, stainless, and nickel-titanium nails under axial compression, respectively. By contrast, the stainless nail yields the smallest gap deformation when an end cap is used.

    Conclusion: Results of the present study show that the end cap is an important factor affecting the mechanical responses of nails fabricated using different materials. Titanium nails are preferred when an end cap is not used, whereas stainless nails are preferred when an end cap is used.

    Keywords: Contact force; Elastic intramedullary nail; Finite element modeling; Tibial diaphyseal fracture.

    Keywords:titanium; nickel-titanium

    关键词:; 镍钛; 不锈钢; 弹性; 髓内钉

    Copyright © Injury. 中文内容为AI机器翻译,仅供参考!

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    Mechanical behaviors of titanium, nickel-titanium, and stainless elastic intramedullary nail in fixation of tibial diaphyseal fractures