应用断裂力学研究腓骨在下肢中的生物力学作用

doi:10.3969/j.issn.1009-976X.2024.06.006

摘要/Abstract

摘要： 目的腓骨植骨术因其良好的治疗效果而被广泛应用于各种骨不连和骨缺损的治疗。然而,腓骨在下肢的生物力学中起着重要的作用。本研究旨在应用断裂力学阐明腓骨在下肢中的生物力学作用。方法随机收集10例骨量正常（T≥-1）的成人膝关节CT,包括6例左膝和4例右膝,已排除其存在骨性疾病。将DICOM格式的CT扫描图像导入Mimics软件,在Mimics软件中提取胫骨和腓骨的三维模型。将每个模型导入到3-MATIC和LS-DYNA软件中进行模型处理和运算条件设置,计算两种模型中胫骨骨折的载荷和断裂时限变化,以评估腓骨在下肢中的生物力学作用。结果验证了模型的有效性,胫腓骨载荷情况与文献报道相似。在腓骨支撑的模型中,胫骨的骨折载荷为10.92±0.45 kN,初始骨折时间为0.65±0.15 s,完全骨折时间为0.69±0.16 s。腓骨缺损模型中,胫骨骨折载荷为9.60±0.37 kN（P<0.05）,初始骨折时间为0.49±0.11 s （P<0.05）,完全骨折时间为0.54±0.12 s（P<0.05）。结论腓骨在下肢负重中起着重要的生物力学作用,值得临床重视。

关键词: 断裂力学, 腓骨缺损, 生物力学, LS-DYNA软件

Abstract: Objective Fibular grafting is widely used in the treatment of various bone nonunions and defects because of its good therapeutic effects. However, the fibula plays important roles in the biomechanics of the lower limbs. In this study, the biomechanical effects of the fibula in lower limbs were researched through mechanics analysis. Methods We randomly collected knee joint computed tomography （CT） scans from ten adults with normal bone mass（T≥-1）, including six left knee and four right knees. None of the volunteers had bone pathologies. The CT scan images in DICOM format were imported into Mimics software, and the three-dimensional models of tibia and fibula were extracted in Mimics software. Each model was imported into 3-MATIC and LS-DYNA software for model processing and operation condition setting, and the changes of load and fracture time in the two models were calculated to evaluate the biomechanical role of the fibula in the lower limbs. Results The validity of the model was verified, and the fibular load condition was similar to those previously reported. In the model with fibular support, the fracture load of the tibia was 10.92±0.45 kN, the initial fracture time was 0.65±0.15 s, and the complete fracture time was 0.69±0.16 s. In the fibular defect model, the fracture load of the tibia was 9.60±0.37 kN （P<0.05）, the initial fracture time was 0.49±0.11 s （P<0.05）, and the complete fracture time was 0.54±0.12 s （P<0.05）. Conclusion The fibula plays an essential biomechanical role in lower limb load-bearing and therefore is worthy of clinical attention.

Key words: fracture mechanics, fibular defect model, biomechanics, LS-DYNA software, lower limbs

中图分类号:

R681.8

陈新荣, 邢建强, 王大巍, 李朋, 邵滨. 应用断裂力学研究腓骨在下肢中的生物力学作用[J]. 岭南现代临床外科, 2025, 24(06): 371-377.

CHEN Xin-rong, XING Jian-qiang, WANG Da-wei, LI Peng, SHAO Bin. The biomechanical role of the fibula in lower limbs： a fracture mechanics analysis[J]. Lingnan Modern Clinics In Surgery, 2025, 24(06): 371-377.

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