跟骨骨囊肿病灶范围与病理性骨折的生物力学关系分析
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上海市科委港澳合作项目(21410760200),生物医药科技支撑项目( 22S31900700),上海市浦东新区新兴交叉学科-数字骨科项目(PWXx2020-08)


Analysis on Biomechanical Relationship Between Calcaneal Cyst Lesion Size and Pathological Fracture
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    摘要:

    目的 探究跟骨孤立性骨囊肿(solitary bone cyst,SBC)病灶范围与病理性骨折的关系,为 SBC 治疗提供参考。方法 基于 CT 图像建立足踝三维有限元模型,在病灶好发区构建 4 种梯度球型骨缺损模型,模拟不同的 SBC 病灶范围,分析步态周期不同时相跟骨的生物力学特征。 结果 在步态周期下,随着 SBC 范围增加,跟骨位移无明显变 化,但峰值应力逐渐增大。 当 SBC 直径超过跟骨宽度的 75% 时,的 1. 48 倍和 7. 74 倍。 结论 当 SBC 直径超过跟骨宽度的 75% 时,应力性骨折风险增大,可早期手术干预。 跟骨沟和 SBC 下方骨皮质是应力集中区,可作为评估应力性骨折的重点区域。

    Abstract:

    Objective To investigate the relationship between lesion size of solitary bone cyst ( SBC) and pathological fracture of calcaneus, so as to provide references for the treatment of SBC. Methods The threedimensional (3D) finite element model of foot and ankle was established based on CT images. Four models with gradient spherical bone defects were constructed in the focal area to simulate different SBC lesion sizes, and the biomechanical characteristics of calcaneus in different gait phases were analyzed. Results With the increasement of SBC size, the kinematics of calcaneus did not change significantly, but the peak stress of calcaneus increased gradually. When the SBC size exceeded 75% of the calcaneal width, the stress in calcaneal sulcus and cortical bone below SBC increased by 1. 48 times and 7. 74 times, respectively. Conclusions The risk of pathological fracture increases when the SBC diameter exceeds 75% of the calcaneal width, and early surgical intervention should be recommended. The calcaneal sulcus and the cortex bone below SBC are stress concentration regions and can be used as important areas to evaluate pathological fractures.

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李鹏飞,徐子环,王永钦,苏志豪,孙万驹,倪 明.跟骨骨囊肿病灶范围与病理性骨折的生物力学关系分析[J].医用生物力学,2023,38(2):303-309

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  • 收稿日期:2022-04-22
  • 最后修改日期:2022-05-27
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  • 在线发布日期: 2023-04-25
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