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Evidence-based support for S1 transpedicular screw entry point modification

BACKGROUND: In the literature, ‘below and lateral to the superior S1 facet’ is defined as the basic technique for screw introduction. Until a recently published modification, no analysis for alternative starting point has been proposed nor evaluated, although some surgeons claim to use some modifica...

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Autores principales: Kubaszewski, Lukasz, Nowakowski, Andrzej, Kaczmarczyk, Jacek
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4016646/
https://www.ncbi.nlm.nih.gov/pubmed/24708681
http://dx.doi.org/10.1186/1749-799X-9-22
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author Kubaszewski, Lukasz
Nowakowski, Andrzej
Kaczmarczyk, Jacek
author_facet Kubaszewski, Lukasz
Nowakowski, Andrzej
Kaczmarczyk, Jacek
author_sort Kubaszewski, Lukasz
collection PubMed
description BACKGROUND: In the literature, ‘below and lateral to the superior S1 facet’ is defined as the basic technique for screw introduction. Until a recently published modification, no analysis for alternative starting point has been proposed nor evaluated, although some surgeons claim to use some modifications. In this study, we analyse the data from anatomical and radiological studies for optimal starting point in transpedicular S1 screw placement. METHODS: A Medline search for key word combination: sacrum, anatomy, pedicle, screws and bone density resulted in 26 publications relevant to the topic. After a review of literature, two articles were chosen, as those including the appropriate set of data. The data retrieved from the articles is used for the analysis. The spatial relation of S1 facet, pedicles and vertebral body with cortical thickness and bone density in normal, osteopenic and osteoporotic sacrum is analysed. RESULTS: Presented data advocates for more medial placement of the screws due to higher bone density and lower bone loss in osteoporosis. Medial shift of the starting point does not increase the risk of spinal canal perforation. Osteoarthritic changes within the facet can augment the posterior supporting point for screw. The facet angular orientation is similar to convergent screw trajectory. CONCLUSIONS: Modified technique for S1 screw placement takes advantage of latest anatomical and clinical data. In our opinion, technique modification improves the reproducibility and may increase stability and the screws within the posterior cortex of the S1 vertebra. Further biomechanical and clinical study should be performed to prove its superiority to classical technique.
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spelling pubmed-40166462014-05-11 Evidence-based support for S1 transpedicular screw entry point modification Kubaszewski, Lukasz Nowakowski, Andrzej Kaczmarczyk, Jacek J Orthop Surg Res Research Article BACKGROUND: In the literature, ‘below and lateral to the superior S1 facet’ is defined as the basic technique for screw introduction. Until a recently published modification, no analysis for alternative starting point has been proposed nor evaluated, although some surgeons claim to use some modifications. In this study, we analyse the data from anatomical and radiological studies for optimal starting point in transpedicular S1 screw placement. METHODS: A Medline search for key word combination: sacrum, anatomy, pedicle, screws and bone density resulted in 26 publications relevant to the topic. After a review of literature, two articles were chosen, as those including the appropriate set of data. The data retrieved from the articles is used for the analysis. The spatial relation of S1 facet, pedicles and vertebral body with cortical thickness and bone density in normal, osteopenic and osteoporotic sacrum is analysed. RESULTS: Presented data advocates for more medial placement of the screws due to higher bone density and lower bone loss in osteoporosis. Medial shift of the starting point does not increase the risk of spinal canal perforation. Osteoarthritic changes within the facet can augment the posterior supporting point for screw. The facet angular orientation is similar to convergent screw trajectory. CONCLUSIONS: Modified technique for S1 screw placement takes advantage of latest anatomical and clinical data. In our opinion, technique modification improves the reproducibility and may increase stability and the screws within the posterior cortex of the S1 vertebra. Further biomechanical and clinical study should be performed to prove its superiority to classical technique. BioMed Central 2014-04-03 /pmc/articles/PMC4016646/ /pubmed/24708681 http://dx.doi.org/10.1186/1749-799X-9-22 Text en Copyright © 2014 Kubaszewski et al.; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.
spellingShingle Research Article
Kubaszewski, Lukasz
Nowakowski, Andrzej
Kaczmarczyk, Jacek
Evidence-based support for S1 transpedicular screw entry point modification
title Evidence-based support for S1 transpedicular screw entry point modification
title_full Evidence-based support for S1 transpedicular screw entry point modification
title_fullStr Evidence-based support for S1 transpedicular screw entry point modification
title_full_unstemmed Evidence-based support for S1 transpedicular screw entry point modification
title_short Evidence-based support for S1 transpedicular screw entry point modification
title_sort evidence-based support for s1 transpedicular screw entry point modification
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4016646/
https://www.ncbi.nlm.nih.gov/pubmed/24708681
http://dx.doi.org/10.1186/1749-799X-9-22
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