Three-dimensional analysis of the sagittal profile in surgically treated Lenke 5 curves in adolescent idiopathic scoliosis

Shen, Kaiying; Clement, R. Carter; Yaszay, Burt; Bastrom, Tracey P.; Upasani, Vidyadhar V.; Newton, Peter O.

doi:10.1007/s43390-020-00168-4

Cited by 3 publications

(3 citation statements)

References 15 publications

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“…of patients Gender Patient Characteristics Study groups (no. of patients) Type of surgery Mean age at surgery (years) Follow-up Mean (SD), months) Male ( n ) Female ( n ) Machino et al (2020) [ 25 ] Cohort study 67 8 59 AIS Posterior rods and pedicle screws PLIF 14.4 mean NR Kluck et al (2020) [ 26 ] Cohort study 99 NR NR AIS Posterior rods and pedicle screws NR 14 ± 2 years NR Shen et al (2020) [ 27 ] Cohort study 19 0 19 AIS Posterior rods and pedicle screws PLIF 15.6 ± 2.1 NR Miyazaki et al (2020) [ 28 ] Cohort study 27 NR NR AIS Hypokyphotic normal–hyperkyphotic PSF with double-rod rotation NR NR Feeley et al (2019) [ 29 ] Cohort study 31 8 23 AIS …”

Section: Resultsmentioning

confidence: 99%

Systematic review and meta-analysis for the impact of rod materials and sizes in the surgical treatment of adolescent idiopathic scoliosis

et al. 2022

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Purpose To assess surgical and safety outcomes associated with different rod materials and diameters in adolescent idiopathic scoliosis (AIS) surgery. Methods A systematic literature review and meta-analysis evaluated the surgical management of AIS patients using pedicle screw fixation systems (i.e., posterior rods and pedicle screws) with rods of different materials and sizes. Postoperative surgical outcomes (e.g., kyphosis and coronal correction) and complications (i.e., hyper/hypo-lumbar lordosis, proximal junctional kyphosis, revisions, reoperations, and infections) were assessed. Random-effects models (REMs) pooled data for outcomes reported in ≥ 2 studies. Results Among 75 studies evaluating AIS surgery using pedicle screw fixation systems, 46 described rod materials and/or diameters. Two studies directly comparing titanium (Ti) and cobalt–chromium (CoCr) rods found that CoCr rods provided significantly better postoperative kyphosis angle correction vs. Ti rods during a shorter follow-up (0–3 months, MD = − 2.98°, 95% CI − 5.79 to − 0.17°, p = 0.04), and longer follow-up (≥ 24 months, MD = − 3.99°, 95% CI − 6.98 to − 1.00, p = 0.009). Surgical infection varied from 2% (95% CI 1.0–3.0%) for 5.5 mm rods to 4% (95% CI 2.0–7.0%) for 6 mm rods. Reoperation rates were lower with 5.5 mm rods 1% (95% CI 0.0–3.0%) vs. 6 mm rods [6% (95% CI 2.0–9.0%); p = 0.04]. Differences in coronal angle, lumbar lordosis, proximal junctional kyphosis, revisions, and infections did not differ significantly (p > 0.05) among rods of different materials or diameters. Conclusion For AIS, CoCr rods provided better correction of thoracic kyphosis compared to Ti rods. Patients with 5.5 mm rods had fewer reoperations vs. 6.0 and 6.35 mm diameter rods. Level of evidence III.

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Section: Resultsmentioning

confidence: 99%

Systematic review and meta-analysis for the impact of rod materials and sizes in the surgical treatment of adolescent idiopathic scoliosis

et al. 2022

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“…49,51 Among thoracic, thoracolumbar, and lumbar curves, thoracic hypokyphosis was consistently observed in 3D studies. 53,[78][79][80] Using CT reconstruction, Schlösser et al 81 reported that anterior overgrowth was observed in primary and compensatory curves, but not at junctional segments. In contrast, 2D studies have either identified hypokyphosis in thoracic curves only, 82,83 or found that TK in AIS patients was equivocal to controls.…”

Section: Sagittal Deformitymentioning

confidence: 99%

3D prediction of curve progression in adolescent idiopathic scoliosis based on biplanar radiological reconstruction

Wan,

Wong,

et al. 2024

Bone Jt Open

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AimsThis systematic review aims to identify 3D predictors derived from biplanar reconstruction, and to describe current methods for improving curve prediction in patients with mild adolescent idiopathic scoliosis.MethodsA comprehensive search was conducted by three independent investigators on MEDLINE, PubMed, Web of Science, and Cochrane Library. Search terms included “adolescent idiopathic scoliosis”,“3D”, and “progression”. The inclusion and exclusion criteria were carefully defined to include clinical studies. Risk of bias was assessed with the Quality in Prognostic Studies tool (QUIPS) and Appraisal tool for Cross-Sectional Studies (AXIS), and level of evidence for each predictor was rated with the Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) approach. In all, 915 publications were identified, with 377 articles subjected to full-text screening; overall, 31 articles were included.ResultsTorsion index (TI) and apical vertebral rotation (AVR) were identified as accurate predictors of curve progression in early visits. Initial TI > 3.7° and AVR > 5.8° were predictive of curve progression. Thoracic hypokyphosis was inconsistently observed in progressive curves with weak evidence. While sagittal wedging was observed in mild curves, there is insufficient evidence for its correlation with curve progression. In curves with initial Cobb angle < 25°, Cobb angle was a poor predictor for future curve progression. Prediction accuracy was improved by incorporating serial reconstructions in stepwise layers. However, a lack of post-hoc analysis was identified in studies involving geometrical models.ConclusionFor patients with mild curves, TI and AVR were identified as predictors of curve progression, with TI > 3.7° and AVR > 5.8° found to be important thresholds. Cobb angle acts as a poor predictor in mild curves, and more investigations are required to assess thoracic kyphosis and wedging as predictors. Cumulative reconstruction of radiographs improves prediction accuracy. Comprehensive analysis between progressive and non-progressive curves is recommended to extract meaningful thresholds for clinical prognostication.Cite this article: Bone Jt Open 2024;5(3):243–251.

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“…Radiant is a software designed for the analysis of medical images such as CT scans. It can convert a simple CT scan into a 3D model [27]. 3D Volume Rendering (VR) assists to convert it into a comprehensive 3D model.…”

Section: Modeling Using Radiantmentioning

confidence: 99%

3D modeling of human spine and the cobb angle measurement in scoliosis patients

Yang¹,

Baqir²,

Kashif³

et al. 2021

J Clin Images Med Case Rep

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Scoliosis is a disease caused by the abnormal curvature of spine. Generally, curvature above 10 degrees is considered as a scoliosis. About 2-4% of the world population is affected by this disease. Therefore, there is a need for such a tool that can help surgeons and bioengineers to study the behavior of a spine under various conditions. Considering the engineering perspectives, it is necessary to understand the fundamental anatomy of the human spine and pathological techniques associated with the orthopedic conditions, so that better technologies can be implemented. The main objective of this work is to develop a 3D model that can simulate various orthopedic conditions associated with the change in Cobb angle. CT scans of patients are obtained from the Spine center of G. hospital, Lahore. 3D Models of actual patients are created using 3D Slicer and Radiant software. Only spine portions are extracted to understand the type of scoliosis, curvature region, and Cobb angles. The cobb angle of each of the patients is measured using Solid Works software. Considering the real data of patients, the severity level of scoliosis in the patients is discussed. Keywords: anthropometry; Cobb angles; CT scans; scoliosis; Spine deformity; vertebra.

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Three-dimensional analysis of the sagittal profile in surgically treated Lenke 5 curves in adolescent idiopathic scoliosis

Cited by 3 publications

References 15 publications

Systematic review and meta-analysis for the impact of rod materials and sizes in the surgical treatment of adolescent idiopathic scoliosis

Systematic review and meta-analysis for the impact of rod materials and sizes in the surgical treatment of adolescent idiopathic scoliosis

3D prediction of curve progression in adolescent idiopathic scoliosis based on biplanar radiological reconstruction

3D modeling of human spine and the cobb angle measurement in scoliosis patients

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