Cargando…

Biomechanical study of C1 posterior arch crossing screw and C2 lamina screw fixations for atlantoaxial joint instability

BACKGROUND: The biomechanics of C1 posterior arch screw and C2 vertebral lamina screw techniques has not been well studied, and the biomechanical performance of the constructs cannot be explained only by cadaver testing. METHODS: From computed tomography images, a nonlinear intact three-dimensional...

Descripción completa

Detalles Bibliográficos
Autores principales: Liu, Chuang, Kamara, Allieu, Yan, Yunhui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7165391/
https://www.ncbi.nlm.nih.gov/pubmed/32303269
http://dx.doi.org/10.1186/s13018-020-01609-6
_version_ 1783523467681857536
author Liu, Chuang
Kamara, Allieu
Yan, Yunhui
author_facet Liu, Chuang
Kamara, Allieu
Yan, Yunhui
author_sort Liu, Chuang
collection PubMed
description BACKGROUND: The biomechanics of C1 posterior arch screw and C2 vertebral lamina screw techniques has not been well studied, and the biomechanical performance of the constructs cannot be explained only by cadaver testing. METHODS: From computed tomography images, a nonlinear intact three-dimensional C1-2 finite element model was developed and validated. And on this basis, models for the odontoid fractures and the three posterior internal fixation techniques were developed. The range of motion (ROM) and stress distribution of the implants were analyzed and compared under flexion, extension, lateral bending, and axial rotation. RESULTS: All three kinds of fixation techniques completely restricted the range of motion (ROM) at the C1-2 operative level. The C1-2 pedicle screw fixation technique showed lower and stable stress peak on implants. The C1 posterior arch screw + C2 pedicle screw and C1 pedicle screw + C2 lamina screw fixation techniques showed higher stress peaks on implants in extension, lateral bending, and axial rotation. CONCLUSIONS: As asymmetrical fixations, C1 posterior arch screw + C2 pedicle screw and C1 pedicle screw + C2 lamina screw fixations may offer better stability in lateral bending and axial rotation, but symmetrical fixation C1-2 pedicle screw can put the implants in a position of mechanical advantage.
format Online
Article
Text
id pubmed-7165391
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher BioMed Central
record_format MEDLINE/PubMed
spelling pubmed-71653912020-04-23 Biomechanical study of C1 posterior arch crossing screw and C2 lamina screw fixations for atlantoaxial joint instability Liu, Chuang Kamara, Allieu Yan, Yunhui J Orthop Surg Res Research Article BACKGROUND: The biomechanics of C1 posterior arch screw and C2 vertebral lamina screw techniques has not been well studied, and the biomechanical performance of the constructs cannot be explained only by cadaver testing. METHODS: From computed tomography images, a nonlinear intact three-dimensional C1-2 finite element model was developed and validated. And on this basis, models for the odontoid fractures and the three posterior internal fixation techniques were developed. The range of motion (ROM) and stress distribution of the implants were analyzed and compared under flexion, extension, lateral bending, and axial rotation. RESULTS: All three kinds of fixation techniques completely restricted the range of motion (ROM) at the C1-2 operative level. The C1-2 pedicle screw fixation technique showed lower and stable stress peak on implants. The C1 posterior arch screw + C2 pedicle screw and C1 pedicle screw + C2 lamina screw fixation techniques showed higher stress peaks on implants in extension, lateral bending, and axial rotation. CONCLUSIONS: As asymmetrical fixations, C1 posterior arch screw + C2 pedicle screw and C1 pedicle screw + C2 lamina screw fixations may offer better stability in lateral bending and axial rotation, but symmetrical fixation C1-2 pedicle screw can put the implants in a position of mechanical advantage. BioMed Central 2020-04-17 /pmc/articles/PMC7165391/ /pubmed/32303269 http://dx.doi.org/10.1186/s13018-020-01609-6 Text en © The Author(s) 2020 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/. The Creative Commons Public Domain Dedication waiver (http://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 Article
Liu, Chuang
Kamara, Allieu
Yan, Yunhui
Biomechanical study of C1 posterior arch crossing screw and C2 lamina screw fixations for atlantoaxial joint instability
title Biomechanical study of C1 posterior arch crossing screw and C2 lamina screw fixations for atlantoaxial joint instability
title_full Biomechanical study of C1 posterior arch crossing screw and C2 lamina screw fixations for atlantoaxial joint instability
title_fullStr Biomechanical study of C1 posterior arch crossing screw and C2 lamina screw fixations for atlantoaxial joint instability
title_full_unstemmed Biomechanical study of C1 posterior arch crossing screw and C2 lamina screw fixations for atlantoaxial joint instability
title_short Biomechanical study of C1 posterior arch crossing screw and C2 lamina screw fixations for atlantoaxial joint instability
title_sort biomechanical study of c1 posterior arch crossing screw and c2 lamina screw fixations for atlantoaxial joint instability
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7165391/
https://www.ncbi.nlm.nih.gov/pubmed/32303269
http://dx.doi.org/10.1186/s13018-020-01609-6
work_keys_str_mv AT liuchuang biomechanicalstudyofc1posteriorarchcrossingscrewandc2laminascrewfixationsforatlantoaxialjointinstability
AT kamaraallieu biomechanicalstudyofc1posteriorarchcrossingscrewandc2laminascrewfixationsforatlantoaxialjointinstability
AT yanyunhui biomechanicalstudyofc1posteriorarchcrossingscrewandc2laminascrewfixationsforatlantoaxialjointinstability