Three-dimensional stereoradiographic modeling of rib cage before and after spinal growing rod procedures in early-onset scoliosis

Sabourin, M.; Jolivet, Erwan; Miladi, Lotfi; Wicart, Philippe; Rampal, Virginie; Skalli, Wafa

doi:10.1016/j.clinbiomech.2010.01.007

Cited by 28 publications

(18 citation statements)

References 31 publications

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“…Clinical parameters computed from 3D models, such as Cobb angle or vertebrae axial rotation, can be used to monitor scoliosis progression during growth or the effect of routine clinical treatment by orthotic bracing or surgery (Ilharreborde et al 2011). Rib cage global parameters, such as rib cage volume, spinal penetration index and rib hump angle (Dubousset et al 2003) and other morphological parameters complete the spine analysis, particularly for the deformed thorax which can raise clinically relevant issues for pulmonary restrictive disease (Sabourin et al 2010;Johnston et al 2011). Furthermore, 3D models are necessary for the development of realistic subject-specific finite element models (FEM) which are used to understand the mechanisms of initiation of structural deformation and predict treatment effects (Nie et al 2009;Clin et al 2010;Drevelle et al 2010;Little et al 2013) or used in crash simulation to investigate injury mechanisms.…”

Section: Introductionmentioning

confidence: 99%

3D reconstruction of rib cage geometry from biplanar radiographs using a statistical parametric model approach

Aubert

Vergari

Ilharreborde

et al. 2014

Computer Methods in Biomechanics and Biomedical Engineering: Im

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. This is an author-deposited version published in: https://sam.ensam.eu Handle ID AbstractRib cage 3D reconstruction is an important prerequisite for thoracic spine modelling, particularly for studies of the deformed thorax in adolescent idiopathic scoliosis. This study proposes a new method for rib cage 3D reconstruction from biplanar radiographs, using a statistical parametric model approach.Simplified parametric models were defined at the hierarchical levels of rib cage surface, rib midline and rib surface, and applied on a database of 86 trunks. The resulting parameter database served to statistical models learning which were used to quickly provide a first estimate of the reconstruction from identifications on both radiographs. This solution was then refined by manual adjustments in order to improve the matching between model and image. Accuracy was assessed by comparison with 29 rib cages from CT scans in terms of geometrical parameter differences and in terms of line-to-line error distance between the rib midlines. Intra and inter-observer reproducibility were determined regarding 20 scoliotic patients.The first estimate (mean reconstruction time of 2'30) was sufficient to extract the main rib cage global parameters with a 95% confidence interval lower than 7%, 8%, 2% and 4° for rib cage volume, antero-posterior and lateral maximal diameters and maximal rib hump, respectively. The mean error distance was 5.4 mm (max 35mm) down to 3.6 mm (max 24 mm) after the manual adjustment step (+3'30).The proposed method will improve developments of rib cage finite element modeling and evaluation of clinical outcomes.

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Section: Introductionmentioning

confidence: 99%

3D reconstruction of rib cage geometry from biplanar radiographs using a statistical parametric model approach

Aubert

Vergari

Ilharreborde

et al. 2014

Computer Methods in Biomechanics and Biomedical Engineering: Im

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“…At last follow-up, their vital capacity was improved. It has been demonstrated that our technique does not change the volume of the rib cage but improves its shape [28]. This might positively influence the pulmonary function, particularly in patients with respiratory failure.…”

Section: Discussionmentioning

confidence: 87%

H3S2 (3 hooks, 2 screws) construct: a simple growing rod technique for early onset scoliosis

Miladi¹,

Journe²,

Mousny

2012

Eur Spine J

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Purpose The purpose of this study was to review the preliminary results of an original fusionless method of treatment for progressive scoliosis in young children. Methods This study retrospectively reviewed the clinical records and radiographs of 23 children with progressive scoliosis who failed to respond to conservative treatment and underwent fusionless surgery using a single solid growing rod construct. All of them were ambulatory and had a followup of minimum 2 years. Sixteen patients were treated by consecutive distraction of a single intramuscular rod, and seven patients with rodding and anterior apical convex fusion. The etiology of the scoliosis included 11 idiopathic, 6 syndromic, 4 congenital, and 2 neurofibromatosis. At initial surgery, the average age was 9.3 ± 2.8 years, with a mean Cobb angle of 68°± 32°. Six patients underwent progressive scoliosis correction in a Stagnara cast prior to surgery, and one patient with an external halo-pelvic Ilizarov device. Results Fusionless single rodding allowed to maintain scoliosis correction in all patients. At an average of 3.5 ± 0.9 years after initial surgery, the 23 patients showed a correction of 57 % in the magnitude of the original curvature. Trunk height increase was documented in all patients and ranged from 1.5 to 11.9 cm. Rod failure was found in three patients and two patients had hardware infection. Only four cases of proximal junctional kyphosis were found at last follow-up. Conclusions Preliminary results from these series of patients show that the presented fusionless single growing rod technique allows to maintain correction of progressive early onset scoliosis while permitting spinal growth, with low complication rate. With this technique, lengthening procedures are used only once in every 10 months and patients are more comfortable as no brace is needed in most cases. This technique does not require any specific spine device. The procedure is simple and efficacious as long as some guidelines are respected.

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“…Sabourin et al [20] used low-dose stereoradiographic imaging (EOS) to analyze the changes in thoracic geometry following the application of a growing rod. The authors used a single-rod construct in the study and reported that with Cobb correction from 50.8°to 26°, a complex three-dimensional effect took place on the rib cage, improving its structure in both the coronal and sagittal planes, although this was less extensive than in the case of a spinal arthrodesis.…”

Section: Resultsmentioning

confidence: 99%

Growing rod concepts: state of the art

Yazıcı

Olgun

2012

Eur Spine J

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Introduction Early-onset spinal deformities present multiple challenges to the surgeon. They may be rapidly progressive and unresponsive to conservative treatment, necessitating surgical intervention at an early age. Materials and methods This text attempts to provide a review of current literature and to summarize the authors' opinions. Results This paper attempts to concisely review available literature regarding the growing rod's inception, evolution, technique, results, and complications and answers some of the controversy still surrounding it. Conclusions The growing rod is one of the first, most evolved, most popular and one of the most heatedly discussed technique of fusionless spinal instrumentation.

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Three-dimensional stereoradiographic modeling of rib cage before and after spinal growing rod procedures in early-onset scoliosis

Cited by 28 publications

References 31 publications

3D reconstruction of rib cage geometry from biplanar radiographs using a statistical parametric model approach

3D reconstruction of rib cage geometry from biplanar radiographs using a statistical parametric model approach

H3S2 (3 hooks, 2 screws) construct: a simple growing rod technique for early onset scoliosis

Growing rod concepts: state of the art

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