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Influence of Rib Cage on Static Characteristics of Scoliotic Spine

BACKGROUND: Scoliosis is a three-dimensional (3D) deformity of the spine, which affects the patient's appearance and may lead to abnormal heart and lung function. The rib cage is a structure composed of ribs, sternum, and costal cartilage, which plays a vital role in stabilising the thoracolumb...

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Autores principales: Lin, Liying, Jia, Shaowei, Yang, Hufei, Li, Ye, Zhang, Shunxin, Fan, Jie, Han, Li
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7591979/
https://www.ncbi.nlm.nih.gov/pubmed/33133237
http://dx.doi.org/10.1155/2020/8858686
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author Lin, Liying
Jia, Shaowei
Yang, Hufei
Li, Ye
Zhang, Shunxin
Fan, Jie
Han, Li
author_facet Lin, Liying
Jia, Shaowei
Yang, Hufei
Li, Ye
Zhang, Shunxin
Fan, Jie
Han, Li
author_sort Lin, Liying
collection PubMed
description BACKGROUND: Scoliosis is a three-dimensional (3D) deformity of the spine, which affects the patient's appearance and may lead to abnormal heart and lung function. The rib cage is a structure composed of ribs, sternum, and costal cartilage, which plays a vital role in stabilising the thoracolumbar spine. This study investigates the influence of the rib cage on the static characteristics of the scoliotic spine. METHODS: Two types of 3D finite element (FE) models with or without rib cage (from T1 to S) were established and analysed based on computed tomography (CT) images, to determine the effects of the rib cage on the static characteristics of the scoliotic spine. The FE software, ABAQUS, was used to analyse the static behaviours of scoliotic spine models under a range of loading conditions, including left side bending, right side bending, front tilt, rear supine, and vertical compression. The changes in the von Mises stress (VMS) within the intervertebral discs of spine models with or without rib cage were studied and compared. RESULTS: After including the rib cage, the maximum VMS at the stress concentrations of the normal and scoliotic spine effectively reduced. The VMS in normal intervertebral discs was gentler than that of scoliotic ones. However, the scoliotic spine was more likely to produce large stress concentration in the intervertebral discs of scoliotic segments. CONCLUSIONS: Under the common postures, intervertebral discs of scoliotic segments are more susceptible to generate stress concentrations compared with the normal spine. The rib cage could effectively keep the intervertebral discs of scoliotic segments from further injuries. These results are of great significance for the prevention and treatment of the scoliotic spine.
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spelling pubmed-75919792020-10-30 Influence of Rib Cage on Static Characteristics of Scoliotic Spine Lin, Liying Jia, Shaowei Yang, Hufei Li, Ye Zhang, Shunxin Fan, Jie Han, Li Appl Bionics Biomech Research Article BACKGROUND: Scoliosis is a three-dimensional (3D) deformity of the spine, which affects the patient's appearance and may lead to abnormal heart and lung function. The rib cage is a structure composed of ribs, sternum, and costal cartilage, which plays a vital role in stabilising the thoracolumbar spine. This study investigates the influence of the rib cage on the static characteristics of the scoliotic spine. METHODS: Two types of 3D finite element (FE) models with or without rib cage (from T1 to S) were established and analysed based on computed tomography (CT) images, to determine the effects of the rib cage on the static characteristics of the scoliotic spine. The FE software, ABAQUS, was used to analyse the static behaviours of scoliotic spine models under a range of loading conditions, including left side bending, right side bending, front tilt, rear supine, and vertical compression. The changes in the von Mises stress (VMS) within the intervertebral discs of spine models with or without rib cage were studied and compared. RESULTS: After including the rib cage, the maximum VMS at the stress concentrations of the normal and scoliotic spine effectively reduced. The VMS in normal intervertebral discs was gentler than that of scoliotic ones. However, the scoliotic spine was more likely to produce large stress concentration in the intervertebral discs of scoliotic segments. CONCLUSIONS: Under the common postures, intervertebral discs of scoliotic segments are more susceptible to generate stress concentrations compared with the normal spine. The rib cage could effectively keep the intervertebral discs of scoliotic segments from further injuries. These results are of great significance for the prevention and treatment of the scoliotic spine. Hindawi 2020-10-19 /pmc/articles/PMC7591979/ /pubmed/33133237 http://dx.doi.org/10.1155/2020/8858686 Text en Copyright © 2020 Liying Lin et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Lin, Liying
Jia, Shaowei
Yang, Hufei
Li, Ye
Zhang, Shunxin
Fan, Jie
Han, Li
Influence of Rib Cage on Static Characteristics of Scoliotic Spine
title Influence of Rib Cage on Static Characteristics of Scoliotic Spine
title_full Influence of Rib Cage on Static Characteristics of Scoliotic Spine
title_fullStr Influence of Rib Cage on Static Characteristics of Scoliotic Spine
title_full_unstemmed Influence of Rib Cage on Static Characteristics of Scoliotic Spine
title_short Influence of Rib Cage on Static Characteristics of Scoliotic Spine
title_sort influence of rib cage on static characteristics of scoliotic spine
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7591979/
https://www.ncbi.nlm.nih.gov/pubmed/33133237
http://dx.doi.org/10.1155/2020/8858686
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