Study on pathogenic mechanism of idiopathic scoliosis by nonlinear buckling analysis
The present paper describes the numerical results by the finite-element method of unstable phenomena of the spine induced by the growth of vertebral bodies in order to investigate the cause of the idiopathic scoliosis. In the previous study, through the linear buckling analysis using simple plate mo...
| Main Authors: | , |
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| Format: | Article |
| Language: | Japanese |
| Published: |
The Japan Society of Mechanical Engineers
2015-09-01
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| Series: | Nihon Kikai Gakkai ronbunshu |
| Subjects: | |
| Online Access: | https://www.jstage.jst.go.jp/article/transjsme/81/830/81_15-00293/_pdf/-char/en |
| _version_ | 1811224856171118592 |
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| author | Han SUN Hideyuki AZEGAMI |
| author_facet | Han SUN Hideyuki AZEGAMI |
| author_sort | Han SUN |
| collection | DOAJ |
| description | The present paper describes the numerical results by the finite-element method of unstable phenomena of the spine induced by the growth of vertebral bodies in order to investigate the cause of the idiopathic scoliosis. In the previous study, through the linear buckling analysis using simple plate models, we confirmed the existence of the buckling phenomena, and made clear the region of geometrical parameters in which the buckling phenomena occur. These results support the buckling hypothesis as a cause of initiation of the idiopathic scoliosis. However, this theory is valid for infinitesimal deformation and is not applicable to estimate the stability for post-buckling behavior. In this study, we conduct post-buckling simulations caused by the growth of vertebral bodies considering the geometrical nonlinearity using the simple plate model and spine models with full width and half width. From the results, the existence of the non-linear buckling phenomena are confirmed in the simple plate model and the spine model with half width. Moreover, after the non-linear buckling phenomena, stable deformations are obtained excepting each one case in the simple plate model and the spine model with half width. However, the magnitudes of the post-buckling deformations are too small to explain the pathogenesis of the severe deformity observed in patients of idiopathic scoliosis. |
| first_indexed | 2024-04-12T08:57:05Z |
| format | Article |
| id | doaj.art-7b59840719f947df848fd1728bb3a87a |
| institution | Directory Open Access Journal |
| issn | 2187-9761 |
| language | Japanese |
| last_indexed | 2024-04-12T08:57:05Z |
| publishDate | 2015-09-01 |
| publisher | The Japan Society of Mechanical Engineers |
| record_format | Article |
| series | Nihon Kikai Gakkai ronbunshu |
| spelling | doaj.art-7b59840719f947df848fd1728bb3a87a2022-12-22T03:39:22ZjpnThe Japan Society of Mechanical EngineersNihon Kikai Gakkai ronbunshu2187-97612015-09-018183015-0029315-0029310.1299/transjsme.15-00293transjsmeStudy on pathogenic mechanism of idiopathic scoliosis by nonlinear buckling analysisHan SUN0Hideyuki AZEGAMI1Graduate School of Information Science,Nagoya UniversityGraduate School of Information Science,Nagoya UniversityThe present paper describes the numerical results by the finite-element method of unstable phenomena of the spine induced by the growth of vertebral bodies in order to investigate the cause of the idiopathic scoliosis. In the previous study, through the linear buckling analysis using simple plate models, we confirmed the existence of the buckling phenomena, and made clear the region of geometrical parameters in which the buckling phenomena occur. These results support the buckling hypothesis as a cause of initiation of the idiopathic scoliosis. However, this theory is valid for infinitesimal deformation and is not applicable to estimate the stability for post-buckling behavior. In this study, we conduct post-buckling simulations caused by the growth of vertebral bodies considering the geometrical nonlinearity using the simple plate model and spine models with full width and half width. From the results, the existence of the non-linear buckling phenomena are confirmed in the simple plate model and the spine model with half width. Moreover, after the non-linear buckling phenomena, stable deformations are obtained excepting each one case in the simple plate model and the spine model with half width. However, the magnitudes of the post-buckling deformations are too small to explain the pathogenesis of the severe deformity observed in patients of idiopathic scoliosis.https://www.jstage.jst.go.jp/article/transjsme/81/830/81_15-00293/_pdf/-char/enbiomechanicsfinite element methodbucklingfinite deformation theoryidiopathic scoliosisgrowth |
| spellingShingle | Han SUN Hideyuki AZEGAMI Study on pathogenic mechanism of idiopathic scoliosis by nonlinear buckling analysis Nihon Kikai Gakkai ronbunshu biomechanics finite element method buckling finite deformation theory idiopathic scoliosis growth |
| title | Study on pathogenic mechanism of idiopathic scoliosis by nonlinear buckling analysis |
| title_full | Study on pathogenic mechanism of idiopathic scoliosis by nonlinear buckling analysis |
| title_fullStr | Study on pathogenic mechanism of idiopathic scoliosis by nonlinear buckling analysis |
| title_full_unstemmed | Study on pathogenic mechanism of idiopathic scoliosis by nonlinear buckling analysis |
| title_short | Study on pathogenic mechanism of idiopathic scoliosis by nonlinear buckling analysis |
| title_sort | study on pathogenic mechanism of idiopathic scoliosis by nonlinear buckling analysis |
| topic | biomechanics finite element method buckling finite deformation theory idiopathic scoliosis growth |
| url | https://www.jstage.jst.go.jp/article/transjsme/81/830/81_15-00293/_pdf/-char/en |
| work_keys_str_mv | AT hansun studyonpathogenicmechanismofidiopathicscoliosisbynonlinearbucklinganalysis AT hideyukiazegami studyonpathogenicmechanismofidiopathicscoliosisbynonlinearbucklinganalysis |