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| 退变性脊柱侧弯的生物力学有限元分析 | |
| 引用本文： | 郑 杰,杨永宏,楼肃亮,张冬生,廖胜辉. 退变性脊柱侧弯的生物力学有限元分析[J]. 中国组织工程研究, 2013, 17(30): 5490-5496. DOI: 10.3969/j.issn.2095-4344.2013.30.012 |
| 作者姓名： | 郑 杰 杨永宏 楼肃亮 张冬生 廖胜辉 |
| 作者单位： | 1解放军第一一七医院骨一科，浙江省杭州市 3100132中南大学计算机系，湖南省长沙市 410012 |
| 摘 要： | 背景：脊柱在结构、形状、材料特性以及承受载荷方面都比较复杂，传统的生物力学方法不能完全解决这些特性问题。目的：探讨退变性脊柱侧弯椎间盘、关节突关节、椎体等的应力分布，为其发生、发展的生物力学机制提供依据。方法：基于退变性脊柱侧弯患者T12-S1上段连续的CT扫描图像，赋予模型特定的材料属性，建立完整、有效的退变性脊柱侧弯三维有限元模型。在前屈、后伸、左侧弯、右侧弯、左旋转、右旋转6种工况下对模型进行加载，计算和分析脊柱的活动度、椎间盘、椎体及关节突关节软骨的应力分布。结果与结论：退变性脊柱侧弯有限元模型比正常腰椎的活动度要小，椎间盘应力分布趋向于椎间盘的四周，后伸运动时各椎间盘应力最大，侧弯顶点椎体容易出现应力集中的情况，在旋转工况下关节突软骨的应力集中最明显，后伸工况下次之，尤其以侧弯顶点节段的关节突软骨影响最大。退变性脊柱侧弯侧弯顶点容易出现应力集中，后伸、旋转运动可加重退变性脊柱侧弯发展。 |
| 关 键 词： | 骨关节植入物 数字化骨科 脊柱侧弯 椎间盘 生物力学 有限元 退变 应力分布 |
| 收稿时间： | 2013-03-05 |
Finite element analysis of degenerative scoliosis biomechanics |
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| Zheng Jie,Yang Yong-hong,Lou Su-liang,Zhang Dong-sheng,Liao Sheng-hui. Finite element analysis of degenerative scoliosis biomechanics[J]. Chinese Journal of Tissue Engineering Research, 2013, 17(30): 5490-5496. DOI: 10.3969/j.issn.2095-4344.2013.30.012 | |
| Authors: | Zheng Jie Yang Yong-hong Lou Su-liang Zhang Dong-sheng Liao Sheng-hui |
| Affiliation: | 1First Department of Orthopedics, the PLA 117 Hospital, Hangzhou 310013, Zhejiang Province, China 2Department of Computer Science, Central South University, Changsha 410012, Hunan Province, China |
| Abstract: | BACKGROUND: Spine is relatively complex in structure, shape, material properties, and load bearing. The traditional biomechanical method cannot solve these problems. OBJECTIVE:To investigate the stress distribution of intervertebral disc, zygapophysial joints and vertebral body of degenerative scoliosis, and to provide accordance to the biomechanical mechanism of degenerative scoliosis occurrence and development. METHODS:Based on the successive CT images of spinal column from T12 to superior segment of S1 of degenerative scoliosis patients, the special material properties were attributed to the model to form the integrated and effective three-dimensional finite element model of degenerative scoliosis. The model was loaded on the anteflexion, extension, left lateral bending, right lateral bending, left rotation and right rotation conditons. Then the spinal activity and the stress distribution of intervertebral disc, vertebral body and articular cartilage of zygapophysial joints were calculated and analyzed.RESULTS AND CONCLUSION:The spinal activities of degenerative scoliosis finite element model were less than those of common lumbar spine. The stress distribution of intervertebral disc was inclined to the verge of it and the greatest stress was appeared on the extension motion. The apex of scoliosis was the place of stress concentration and the obvious stress concentration of articular cartilage of zygapophysial joints was appeared on the rotation motion, then followed by the extension motion, especially that of articular cartilage of zygapophysial joints on the apex of scoliosis. Stress concentration is easily appeared on the apex of scoliosis, and the extension and rotation motion can aggravate the development of degenerative scoliosis. |
| Keywords: | bone and joint implants digital orthopedics scoliosis intervertebral disc biomechanics finite element degeneration stress distribution |
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