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Higher pedicle screw density does not improve curve correction in Lenke 2 adolescent idiopathic scoliosis
PURPOSE: Higher pedicle screw density posterior spinal fusion (PSF) constructs have not been shown to result in improved curve correction in Lenke 1 and 5 adolescent idiopathic scoliosis (AIS) but do increase cost. The purpose of this study questioned whether higher screw density constructs improved...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
BioMed Central
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8061215/ https://www.ncbi.nlm.nih.gov/pubmed/33882975 http://dx.doi.org/10.1186/s13018-021-02415-4 |
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author | Skalak, Timothy J. Gagnier, Joel Caird, Michelle S. Farley, Frances A. Li, Ying |
author_facet | Skalak, Timothy J. Gagnier, Joel Caird, Michelle S. Farley, Frances A. Li, Ying |
author_sort | Skalak, Timothy J. |
collection | PubMed |
description | PURPOSE: Higher pedicle screw density posterior spinal fusion (PSF) constructs have not been shown to result in improved curve correction in Lenke 1 and 5 adolescent idiopathic scoliosis (AIS) but do increase cost. The purpose of this study questioned whether higher screw density constructs improved curve correction and maintenance of correction in Lenke 2 AIS. Secondary goals were to identify predictive factors for correction and postoperative magnitude of curves in Lenke 2 AIS. METHODS: We identified patients 11 to 17 years old who underwent primary PSF for Lenke 2 AIS between 2007 and 2017 who had minimum follow-up of 2 years. Demographic and radiographic data were collected to perform regression and elimination analysis. RESULTS: Thirty patients (21 females, 9 males) were analyzed. Average age and SD at time of surgery was 14.0 ± 1.8 years (range, 11–17 years), and median follow-up was 2.8 years (IQR 2.1–4.0 years). Implant density did not predict final postoperative curve magnitude. Predictors of final postoperative curve magnitude were sex and preoperative curve magnitude. Predictors of percentage of correction of major curve were sex and age at the time of surgery. Predictors of final postoperative thoracic kyphosis were sex and percent flexibility preop. Females had lower final postoperative major curve magnitude, a higher percent curve correction, and lower postoperative thoracic kyphosis. CONCLUSIONS: Increased implant density is not predictive of postoperative curve magnitude in Lenke 2 AIS. Predictors of postoperative curve magnitude are sex and preoperative curve magnitude. LEVEL OF EVIDENCE: Level III, retrospective observational |
format | Online Article Text |
id | pubmed-8061215 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-80612152021-04-22 Higher pedicle screw density does not improve curve correction in Lenke 2 adolescent idiopathic scoliosis Skalak, Timothy J. Gagnier, Joel Caird, Michelle S. Farley, Frances A. Li, Ying J Orthop Surg Res Research Article PURPOSE: Higher pedicle screw density posterior spinal fusion (PSF) constructs have not been shown to result in improved curve correction in Lenke 1 and 5 adolescent idiopathic scoliosis (AIS) but do increase cost. The purpose of this study questioned whether higher screw density constructs improved curve correction and maintenance of correction in Lenke 2 AIS. Secondary goals were to identify predictive factors for correction and postoperative magnitude of curves in Lenke 2 AIS. METHODS: We identified patients 11 to 17 years old who underwent primary PSF for Lenke 2 AIS between 2007 and 2017 who had minimum follow-up of 2 years. Demographic and radiographic data were collected to perform regression and elimination analysis. RESULTS: Thirty patients (21 females, 9 males) were analyzed. Average age and SD at time of surgery was 14.0 ± 1.8 years (range, 11–17 years), and median follow-up was 2.8 years (IQR 2.1–4.0 years). Implant density did not predict final postoperative curve magnitude. Predictors of final postoperative curve magnitude were sex and preoperative curve magnitude. Predictors of percentage of correction of major curve were sex and age at the time of surgery. Predictors of final postoperative thoracic kyphosis were sex and percent flexibility preop. Females had lower final postoperative major curve magnitude, a higher percent curve correction, and lower postoperative thoracic kyphosis. CONCLUSIONS: Increased implant density is not predictive of postoperative curve magnitude in Lenke 2 AIS. Predictors of postoperative curve magnitude are sex and preoperative curve magnitude. LEVEL OF EVIDENCE: Level III, retrospective observational BioMed Central 2021-04-21 /pmc/articles/PMC8061215/ /pubmed/33882975 http://dx.doi.org/10.1186/s13018-021-02415-4 Text en © The Author(s) 2021 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 Article Skalak, Timothy J. Gagnier, Joel Caird, Michelle S. Farley, Frances A. Li, Ying Higher pedicle screw density does not improve curve correction in Lenke 2 adolescent idiopathic scoliosis |
title | Higher pedicle screw density does not improve curve correction in Lenke 2 adolescent idiopathic scoliosis |
title_full | Higher pedicle screw density does not improve curve correction in Lenke 2 adolescent idiopathic scoliosis |
title_fullStr | Higher pedicle screw density does not improve curve correction in Lenke 2 adolescent idiopathic scoliosis |
title_full_unstemmed | Higher pedicle screw density does not improve curve correction in Lenke 2 adolescent idiopathic scoliosis |
title_short | Higher pedicle screw density does not improve curve correction in Lenke 2 adolescent idiopathic scoliosis |
title_sort | higher pedicle screw density does not improve curve correction in lenke 2 adolescent idiopathic scoliosis |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8061215/ https://www.ncbi.nlm.nih.gov/pubmed/33882975 http://dx.doi.org/10.1186/s13018-021-02415-4 |
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