3岁儿童C4-C5颈椎有限元模型开发及拉伸、弯曲验证

doi:10.3969/j.issn.0258-8021.2015. 01.006

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摘要基于CT扫描，建立具有精确骨骼几何及详细椎间盘解剖学结构的3岁儿童C4-C5颈椎段有限元模型；参考成人颈部生物材料实验数据及相关成人与对比研究结果，采用缩放方法计算得到3岁儿童颈部组织材料参数；分别在准静态、动态拉伸以及准静态弯曲-伸展、侧向弯曲及轴向旋转载荷条件下，对模型进
行验证。结果显示，准静态拉伸刚度为211.8 N/mm，动态拉伸最终失效力为759.9 N，最终失效位移为5.08 mm，均与实验值吻合良好；准静态伸展、弯曲、侧向弯曲及轴向旋转运动范围分别为9.75°、9.29°、3.79°和7.04°，均在实验基准数据允许的误差范围内，吻合良好。结论表明：该模型能较好地反映3岁儿童C4-C5颈椎段在准静态、动态拉伸以及准静态弯曲-伸展、侧向弯曲和轴向旋转载荷下的生物力学特性，具有较高的生物逼真度

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	曹立波魏嵬张冠军*

关键词 ：儿童颈椎, 生物力学, 有限元, 准静, 验证

Abstract：Based on CT scans, the C4-C5 cervical segment finite element model for 3 year old child was developed with accurate skeletal geometries and detailed anatomical structures of intervertebral disc. Grounded on biomechanical experiments published of adult cervical spine and the comparison of the data between adult and child, scaling methods were used to calculate the material parameters for 3 year old pediatric cervical spine. The model was validated under quasistatic and dynamic tensile, quasistatic flexion extension, and lateral bending as well as axialrotation loadings. It is indicated that responses for the tensile simulations are consistent with those of the experiments, with the quasi static tensile stiffness of 211.8 N/mm, dynamic tensile ultimate failure force of 759.9 N and ultimate failure displacement of 5.08 mm in simulations. Responses for quasi static bending simulations were within the standard deviation or corridor of the experiments, with the range of motion for extension 9.75°, flexion 9.29°, lateral bending 3.79°and axial rotation 7.04°. It is indicated that this model is biofidelic enough to reflect the biomechanical properties of 3 year old pediatric C4-C5 cervical spine under quasi static and dynamic tensile, as well as quasistatic flexion extension, lateral bending and axial rotation loadings.

Key words： pediatric cervical spine biomechanics finite element quasi static validation

基金资助:国家自然科学基金(11172099，51205118)

引用本文:

曹立波魏嵬张冠军*. 3岁儿童C4-C5颈椎有限元模型开发及拉伸、弯曲验证[J]. 中国生物医学工程学报, 2015, 34(1): 37-.
Huang Zhiwei Dai Ning^* Liu Hao. 3 Year Old Pediatric C4-C5 Cervical Spine. journal1, 2015, 34(1): 37-.

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http://cjbme.csbme.org/CN/10.3969/j.issn.0258-8021.2015. 01.006 或 http://cjbme.csbme.org/CN/Y2015/V34/I1/37

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