The Effect of Concave-Side Intertransverse Ligament Laxity on the Stress of AIS Lumbar Spine Based on Finite Element Method
(1) Background: Scoliosis has the mechanical characteristic of asymmetric stress distribution, which is one of the reasons for the aggravation of scoliosis. Bracing therapy is the best treatment for AIS, but it is difficult and costly to operate. Is it possible to reduce pressure in the concave side...
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| Format: | Article |
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MDPI AG
2022-11-01
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| Series: | Bioengineering |
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| Online Access: | https://www.mdpi.com/2306-5354/9/12/724 |
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| author | Linjie Zhang Qiaolin Zhang Yan Zhang Musinguzi Arthur Ee-Chon Teo István Bíró Yaodong Gu |
| author_facet | Linjie Zhang Qiaolin Zhang Yan Zhang Musinguzi Arthur Ee-Chon Teo István Bíró Yaodong Gu |
| author_sort | Linjie Zhang |
| collection | DOAJ |
| description | (1) Background: Scoliosis has the mechanical characteristic of asymmetric stress distribution, which is one of the reasons for the aggravation of scoliosis. Bracing therapy is the best treatment for AIS, but it is difficult and costly to operate. Is it possible to reduce pressure in the concave side by relaxing the ITL in the concave side of scoliosis, so as to improve the abnormal stress distribution of scoliosis? In this paper, a finite element method was used to simulate the effect of the relaxation of concave-side ITL on the stress of a lumbar spine with scoliosis, which provides some guidance for the treatment of scoliosis. (2) Methods: Using CT images of a patient with scoliosis whose Cobb Angle was 43° and Lordosis Angle was 45, a scoliosis lumbar was established, and Young’s modulus of the ITL of the concave-side lumbar spine was reduced by 95% to simulate ligament relaxation. By comparing the stress condition of the model vertebral body with no ligament relaxation, the effect of concave-side ITL relaxation on the mechanical characteristics of scoliosis lumbar spine was explored. (3) Results: An effective and complete model of the lumbar spine was established. The concave ITL relaxed, which only had a great impact on the bending loads. After the ligament was relaxed, the stability of the spine was reduced. Stress concentration on the concave side of vertebrae and the IVD was aggravated. Under loads on the convex side, the maximum stress on the vertebral body and the IVD increased significantly, making lumbar vertebrae more vulnerable to injury. (4) Conclusions: Laxity of the ITL on the concave side of the AIS lumbar only affects the bending load. Laxity of the concave-side ligament will reduce the stability of the lumbar, aggravate the uneven stress distribution of scoliotic lumbar vertebrae, increase the risk of IVD injury, and be unfavorable for the scoliotic lumbar spine. Relaxation of the concave ITL alone is not an effective way to treat scoliosis. |
| first_indexed | 2024-03-09T17:19:36Z |
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| language | English |
| last_indexed | 2024-03-09T17:19:36Z |
| publishDate | 2022-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Bioengineering |
| spelling | doaj.art-d73a867030fb426ca6a226b8e11075f42023-11-24T13:19:53ZengMDPI AGBioengineering2306-53542022-11-0191272410.3390/bioengineering9120724The Effect of Concave-Side Intertransverse Ligament Laxity on the Stress of AIS Lumbar Spine Based on Finite Element MethodLinjie Zhang0Qiaolin Zhang1Yan Zhang2Musinguzi Arthur3Ee-Chon Teo4István Bíró5Yaodong Gu6Faculty of Sports Science, Ningbo University, Ningbo 315211, ChinaFaculty of Sports Science, Ningbo University, Ningbo 315211, ChinaFaculty of Sports Science, Ningbo University, Ningbo 315211, ChinaFaculty of Sports Science, Ningbo University, Ningbo 315211, ChinaFaculty of Sports Science, Ningbo University, Ningbo 315211, ChinaFaculty of Engineering, University of Szeged, 6720 Szeged, HungaryFaculty of Sports Science, Ningbo University, Ningbo 315211, China(1) Background: Scoliosis has the mechanical characteristic of asymmetric stress distribution, which is one of the reasons for the aggravation of scoliosis. Bracing therapy is the best treatment for AIS, but it is difficult and costly to operate. Is it possible to reduce pressure in the concave side by relaxing the ITL in the concave side of scoliosis, so as to improve the abnormal stress distribution of scoliosis? In this paper, a finite element method was used to simulate the effect of the relaxation of concave-side ITL on the stress of a lumbar spine with scoliosis, which provides some guidance for the treatment of scoliosis. (2) Methods: Using CT images of a patient with scoliosis whose Cobb Angle was 43° and Lordosis Angle was 45, a scoliosis lumbar was established, and Young’s modulus of the ITL of the concave-side lumbar spine was reduced by 95% to simulate ligament relaxation. By comparing the stress condition of the model vertebral body with no ligament relaxation, the effect of concave-side ITL relaxation on the mechanical characteristics of scoliosis lumbar spine was explored. (3) Results: An effective and complete model of the lumbar spine was established. The concave ITL relaxed, which only had a great impact on the bending loads. After the ligament was relaxed, the stability of the spine was reduced. Stress concentration on the concave side of vertebrae and the IVD was aggravated. Under loads on the convex side, the maximum stress on the vertebral body and the IVD increased significantly, making lumbar vertebrae more vulnerable to injury. (4) Conclusions: Laxity of the ITL on the concave side of the AIS lumbar only affects the bending load. Laxity of the concave-side ligament will reduce the stability of the lumbar, aggravate the uneven stress distribution of scoliotic lumbar vertebrae, increase the risk of IVD injury, and be unfavorable for the scoliotic lumbar spine. Relaxation of the concave ITL alone is not an effective way to treat scoliosis.https://www.mdpi.com/2306-5354/9/12/724intertransverse ligamentligament relaxationadolescent idiopathic scoliosisfinite elementstress distribution |
| spellingShingle | Linjie Zhang Qiaolin Zhang Yan Zhang Musinguzi Arthur Ee-Chon Teo István Bíró Yaodong Gu The Effect of Concave-Side Intertransverse Ligament Laxity on the Stress of AIS Lumbar Spine Based on Finite Element Method Bioengineering intertransverse ligament ligament relaxation adolescent idiopathic scoliosis finite element stress distribution |
| title | The Effect of Concave-Side Intertransverse Ligament Laxity on the Stress of AIS Lumbar Spine Based on Finite Element Method |
| title_full | The Effect of Concave-Side Intertransverse Ligament Laxity on the Stress of AIS Lumbar Spine Based on Finite Element Method |
| title_fullStr | The Effect of Concave-Side Intertransverse Ligament Laxity on the Stress of AIS Lumbar Spine Based on Finite Element Method |
| title_full_unstemmed | The Effect of Concave-Side Intertransverse Ligament Laxity on the Stress of AIS Lumbar Spine Based on Finite Element Method |
| title_short | The Effect of Concave-Side Intertransverse Ligament Laxity on the Stress of AIS Lumbar Spine Based on Finite Element Method |
| title_sort | effect of concave side intertransverse ligament laxity on the stress of ais lumbar spine based on finite element method |
| topic | intertransverse ligament ligament relaxation adolescent idiopathic scoliosis finite element stress distribution |
| url | https://www.mdpi.com/2306-5354/9/12/724 |
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