| 摘要: |
| 摘要：目的：青少年特发性脊柱侧凸的病因、病理及矫形机制一直为医学界、工学界的众多学者、专家所关注，而由于脊柱结构的复杂性，导致脊柱模型的建立异常困难。本文将机械学的思想与脊柱生物力学、医学结合，从而寻求一种新型、快捷、有效的建模方式，并对该方法所建模型的有效性进行验证。方法：本研究将人体脊柱中的椎体、椎间盘、小关节等看作是机械零件，根据文献中及医学院提供的数据建立各个模型，按照一定的装配关系将其组合成一个整体，然后把建立好的简化模型导入ANSYS分析软件中，建立腰椎L1～L5节段的有限元模型。结果：本文通过机械建模的方式建立了L1～L5节段的三维简化几何模型，验证了模型的有效性。结论：运用机械学方法建立的人体脊柱L1～L5节段简化模型是有效的。该模型与真实脊柱有较高的相似性，其关键尺寸、相互间的连接关系、运动关系等把握准确，建模周期短，方便修改。希望该建模方法能够为日后人们探索青少年特发性脊柱侧凸的病因、病理提供便利。 |
| 关键词: 有限元分析 生物力学 腰椎 机械建模 |
| DOI： |
| 投稿时间：2013-03-15修订日期：2013-07-04 |
| 基金项目: |
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| Construction and validation of simplified model of L1-L5 section lumbar |
| CAI Fang-fang1,SUN Dong-ming1*,XIE Jing-ming2,ZHAO Zhi2 |
(1.Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650093,Yunnan, China
2.Department of Orthopedics, the Second Affiliated Hospital of Kunming Medical College, Kunming 650101, Yunnan, China
*Corresponding author. ) |
| Abstract: |
| Abstract: Objective: The pathology and orthodontic mechanism of adolescent idiopathic scoliosis are always concerned by scholars and experts of medical profession and engineering community. The structure of spine is complex, and the establishment of the spine model is more difficult. With the combination of mechanical thoughts, spine biomechanics and medicine, one new modeling method which is fast and effective was explored. The effectiveness of this method was verified in the paper. Methods: The vertebra, intervertebral discs, small joint of spinal were regarded as the mechanical parts in the study. According to the data which is provided by literature and medical school, the models was established and they were combined into a whole in the light of certain assembly relation. Then the simplified model was imported into ANSYS and the finite element model of L1～L5 segment lumbar was established. Results: The 3D simplified geometry model of L1～L5 section lumbar was established by the mechanical methods and its effectiveness was verified in this paper. Conclusion: The simplified model of L1～L5 section lumbar which was built by mechanical method was effective. The model was similar to the real spinal. The critical sizes, mutual connection relationship and sports relationship were grasped accurately. The modeling cycle was short and it could be modified conveniently. It is hoped that this modeling method can provide some convenience for exploring the etiology and pathology of adolescent idiopathic scoliosis in future. |
| Key words: finite element analysis biomechanics lumbar vertebrae mechanical molding |
