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Biomechanical evaluation of reconstruction of the posterior complex in restorative laminoplasty with miniplates

OBJECTIVE: To evaluate the biomechanical effects of different miniplates on restorative laminoplasty. METHODS: Assembled restorative laminoplasty models were developed based on 3D printed L4 lamina. Based on different internal fixations, the research was divided into H-shaped miniplates (HSMs) group...

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Autores principales: Chen, Jianmin, Liu, Guoyin, Bao, Tianyi, Xu, Yuansheng, Luo, Hu, Wu, Yu, Cai, Dawei, Qin, Feng, Zhao, Jianning
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10103505/
https://www.ncbi.nlm.nih.gov/pubmed/37060044
http://dx.doi.org/10.1186/s12891-023-06380-3
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author Chen, Jianmin
Liu, Guoyin
Bao, Tianyi
Xu, Yuansheng
Luo, Hu
Wu, Yu
Cai, Dawei
Qin, Feng
Zhao, Jianning
author_facet Chen, Jianmin
Liu, Guoyin
Bao, Tianyi
Xu, Yuansheng
Luo, Hu
Wu, Yu
Cai, Dawei
Qin, Feng
Zhao, Jianning
author_sort Chen, Jianmin
collection PubMed
description OBJECTIVE: To evaluate the biomechanical effects of different miniplates on restorative laminoplasty. METHODS: Assembled restorative laminoplasty models were developed based on 3D printed L4 lamina. Based on different internal fixations, the research was divided into H-shaped miniplates (HSMs) group, two-hole miniplates (THMs) group, and L-shaped miniplates (LSMs) group. The static and dynamic compression tests were analyzed to investigate the biomechanical effects of different internal fixations in restorative laminoplasty, until the failure and fracture of miniplates, or the collapse of miniplates. The static compression tests adopted the speed control mode, and the dynamic fatigue compression tests adopted the load control mode. RESULTS: The “door close” and the collapse of lamina occurred in THMs group and LSMs group, and plate break occurred in LSMs group. However, these phenomenon was absent in HSMs group, and only plate crack around a screw and looseness of a screw tail cap were found in HSMs group. The sustainable yield load of HSMs group was greater than that of THMs group and LSMs group (P < 0.05). No significant difference in yielding-displacement was found between HSMs group and LSMs group (P > 0.05), while both were much less than that of THMs (P < 0.05). Moreover, the compressive stiffness and the axial displacement under the same mechanical load were arranged as follows: HSMs group > LSMs group > THMs group (P < 0.05). The results of dynamic compression test revealed that the peak load of HSMs group could reached 873 N and was 95% of the average yield load of the static compression, and was better than that in THMs group and LSMs group (P < 0.05). Besides, according to the fatigue life-peak load diagram, the ultimate load of HSMs group was more than twice that of THMs group or LSMs group. CONCLUSIONS: The mechanical strength of H-shaped miniplates was superior to two-hole miniplates and L-shaped miniplates in maintaining spinal canal enlargement and spinal stability, and was more excellent in fatigue stability and ultimate load.
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spelling pubmed-101035052023-04-15 Biomechanical evaluation of reconstruction of the posterior complex in restorative laminoplasty with miniplates Chen, Jianmin Liu, Guoyin Bao, Tianyi Xu, Yuansheng Luo, Hu Wu, Yu Cai, Dawei Qin, Feng Zhao, Jianning BMC Musculoskelet Disord Research OBJECTIVE: To evaluate the biomechanical effects of different miniplates on restorative laminoplasty. METHODS: Assembled restorative laminoplasty models were developed based on 3D printed L4 lamina. Based on different internal fixations, the research was divided into H-shaped miniplates (HSMs) group, two-hole miniplates (THMs) group, and L-shaped miniplates (LSMs) group. The static and dynamic compression tests were analyzed to investigate the biomechanical effects of different internal fixations in restorative laminoplasty, until the failure and fracture of miniplates, or the collapse of miniplates. The static compression tests adopted the speed control mode, and the dynamic fatigue compression tests adopted the load control mode. RESULTS: The “door close” and the collapse of lamina occurred in THMs group and LSMs group, and plate break occurred in LSMs group. However, these phenomenon was absent in HSMs group, and only plate crack around a screw and looseness of a screw tail cap were found in HSMs group. The sustainable yield load of HSMs group was greater than that of THMs group and LSMs group (P < 0.05). No significant difference in yielding-displacement was found between HSMs group and LSMs group (P > 0.05), while both were much less than that of THMs (P < 0.05). Moreover, the compressive stiffness and the axial displacement under the same mechanical load were arranged as follows: HSMs group > LSMs group > THMs group (P < 0.05). The results of dynamic compression test revealed that the peak load of HSMs group could reached 873 N and was 95% of the average yield load of the static compression, and was better than that in THMs group and LSMs group (P < 0.05). Besides, according to the fatigue life-peak load diagram, the ultimate load of HSMs group was more than twice that of THMs group or LSMs group. CONCLUSIONS: The mechanical strength of H-shaped miniplates was superior to two-hole miniplates and L-shaped miniplates in maintaining spinal canal enlargement and spinal stability, and was more excellent in fatigue stability and ultimate load. BioMed Central 2023-04-14 /pmc/articles/PMC10103505/ /pubmed/37060044 http://dx.doi.org/10.1186/s12891-023-06380-3 Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research
Chen, Jianmin
Liu, Guoyin
Bao, Tianyi
Xu, Yuansheng
Luo, Hu
Wu, Yu
Cai, Dawei
Qin, Feng
Zhao, Jianning
Biomechanical evaluation of reconstruction of the posterior complex in restorative laminoplasty with miniplates
title Biomechanical evaluation of reconstruction of the posterior complex in restorative laminoplasty with miniplates
title_full Biomechanical evaluation of reconstruction of the posterior complex in restorative laminoplasty with miniplates
title_fullStr Biomechanical evaluation of reconstruction of the posterior complex in restorative laminoplasty with miniplates
title_full_unstemmed Biomechanical evaluation of reconstruction of the posterior complex in restorative laminoplasty with miniplates
title_short Biomechanical evaluation of reconstruction of the posterior complex in restorative laminoplasty with miniplates
title_sort biomechanical evaluation of reconstruction of the posterior complex in restorative laminoplasty with miniplates
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10103505/
https://www.ncbi.nlm.nih.gov/pubmed/37060044
http://dx.doi.org/10.1186/s12891-023-06380-3
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