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Optimization of a lumbar interspinous fixation device for the lumbar spine with degenerative disc disease
Interspinous spacer devices used in interspinous fixation surgery remove soft tissues in the lumbar spine, such as ligaments and muscles and may cause degenerative diseases in adjacent segments its stiffness is higher than that of the lumbar spine. Therefore, this study aimed to structurally and kin...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Public Library of Science
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8989208/ https://www.ncbi.nlm.nih.gov/pubmed/35390024 http://dx.doi.org/10.1371/journal.pone.0265926 |
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author | Heo, Minhyeok Yun, Jihwan Kim, Hanjong Lee, Sang-Soo Park, Seonghun |
author_facet | Heo, Minhyeok Yun, Jihwan Kim, Hanjong Lee, Sang-Soo Park, Seonghun |
author_sort | Heo, Minhyeok |
collection | PubMed |
description | Interspinous spacer devices used in interspinous fixation surgery remove soft tissues in the lumbar spine, such as ligaments and muscles and may cause degenerative diseases in adjacent segments its stiffness is higher than that of the lumbar spine. Therefore, this study aimed to structurally and kinematically optimize a lumbar interspinous fixation device (LIFD) using a full lumbar finite element model that allows for minimally invasive surgery, after which the normal behavior of the lumbar spine is not affected. The proposed healthy and degenerative lumbar spine models reflect the physiological characteristics of the lumbar spine in the human body. The optimum number of spring turns and spring wire diameter in the LIFD were selected as 3 mm and 2 turns, respectively—from a dynamic range of motion (ROM) perspective rather than a structural maximum stress perspective—by applying a 7.5 N∙m extension moment and 500 N follower load to the LIFD-inserted lumbar spine model. As the spring wire diameter in the LIFD increased, the maximum stress generated in the LIFD increased, and the ROM decreased. Further, as the number of spring turns decreased, both the maximum stress and ROM of the LIFD increased. When the optimized LIFD was inserted into a degenerative lumbar spine model with a degenerative disc, the facet joint force of the L3-L4 lumbar segment was reduced by 56%–98% in extension, lateral bending, and axial rotation. These results suggest that the optimized device can strengthen the stability of the lumbar spine that has undergone interspinous fixation surgery and reduce the risk of degenerative diseases at the adjacent lumbar segments. |
format | Online Article Text |
id | pubmed-8989208 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Public Library of Science |
record_format | MEDLINE/PubMed |
spelling | pubmed-89892082022-04-08 Optimization of a lumbar interspinous fixation device for the lumbar spine with degenerative disc disease Heo, Minhyeok Yun, Jihwan Kim, Hanjong Lee, Sang-Soo Park, Seonghun PLoS One Research Article Interspinous spacer devices used in interspinous fixation surgery remove soft tissues in the lumbar spine, such as ligaments and muscles and may cause degenerative diseases in adjacent segments its stiffness is higher than that of the lumbar spine. Therefore, this study aimed to structurally and kinematically optimize a lumbar interspinous fixation device (LIFD) using a full lumbar finite element model that allows for minimally invasive surgery, after which the normal behavior of the lumbar spine is not affected. The proposed healthy and degenerative lumbar spine models reflect the physiological characteristics of the lumbar spine in the human body. The optimum number of spring turns and spring wire diameter in the LIFD were selected as 3 mm and 2 turns, respectively—from a dynamic range of motion (ROM) perspective rather than a structural maximum stress perspective—by applying a 7.5 N∙m extension moment and 500 N follower load to the LIFD-inserted lumbar spine model. As the spring wire diameter in the LIFD increased, the maximum stress generated in the LIFD increased, and the ROM decreased. Further, as the number of spring turns decreased, both the maximum stress and ROM of the LIFD increased. When the optimized LIFD was inserted into a degenerative lumbar spine model with a degenerative disc, the facet joint force of the L3-L4 lumbar segment was reduced by 56%–98% in extension, lateral bending, and axial rotation. These results suggest that the optimized device can strengthen the stability of the lumbar spine that has undergone interspinous fixation surgery and reduce the risk of degenerative diseases at the adjacent lumbar segments. Public Library of Science 2022-04-07 /pmc/articles/PMC8989208/ /pubmed/35390024 http://dx.doi.org/10.1371/journal.pone.0265926 Text en © 2022 Heo et al https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
spellingShingle | Research Article Heo, Minhyeok Yun, Jihwan Kim, Hanjong Lee, Sang-Soo Park, Seonghun Optimization of a lumbar interspinous fixation device for the lumbar spine with degenerative disc disease |
title | Optimization of a lumbar interspinous fixation device for the lumbar spine with degenerative disc disease |
title_full | Optimization of a lumbar interspinous fixation device for the lumbar spine with degenerative disc disease |
title_fullStr | Optimization of a lumbar interspinous fixation device for the lumbar spine with degenerative disc disease |
title_full_unstemmed | Optimization of a lumbar interspinous fixation device for the lumbar spine with degenerative disc disease |
title_short | Optimization of a lumbar interspinous fixation device for the lumbar spine with degenerative disc disease |
title_sort | optimization of a lumbar interspinous fixation device for the lumbar spine with degenerative disc disease |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8989208/ https://www.ncbi.nlm.nih.gov/pubmed/35390024 http://dx.doi.org/10.1371/journal.pone.0265926 |
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