The Effect of Apical Vertebra Position on Growing Rod Treatment: A Clinical and Finite Element Study

2022-01-01
DURSUN, GÖKAY
Cetik, Riza M.
GÜZEL, DİLEK
DEMİRKIRAN, HALİL GÖKHAN
Ramazanov, Rafik
Dede, Ozgur
Gürses, Ercan
Yazici, Muharrem
© 2022 Lippincott Williams and Wilkins. All rights reserved.Background: Growing rods (GRs) is a commonly utilized technique for the management of early-onset scoliosis. The significance of the position of the apical vertebrae relative to the rods is not known. The purpose of this study is to analyze the potential effects of the position of the apical vertebrae in relation to the GRs on deformity control through plain radiographs and finite element analysis (FEA) modeling. Methods: We identified 140 patients treated with GR between 2000 and 2018. Patients who had a congenital vertebral anomaly or <2-year follow-up were excluded. Curve magnitude, traction radiograph under general anesthesia (TRUGA) flexibility, apical rotation, the lengths of T1-12, T1-S1, and the instrumented segments were recorded. Patients were divided into 3 groups according to the apical position on the postoperative radiographs: group 1 (both pedicles are between the rods), group 2 (convex rod is between the apical vertebra pedicles), group 3 (both pedicles are lateral to the convex rod). FEA models were created simulating the 3 groups. Both radiographic and FEA data were analyzed to compare the deformity control and growth in each group. Results: Fifty-eight patients were included in the final analyses (mean age 84 mo; range: 38 to 148). Ten patients (17%) were in group 1, 34 (59%) in group 2, and 14 (24%) in group 3. Difference between TRUGA flexibilities was statistically insignificant. Group 3 was the least successful in terms of both height gain and rotational control. FEA showed a decrease in rotation and displacement for every group, however, the residual rotation and displacement was highest in group 3. Conclusions: Bringing the apex in line with the GR increases the capacity of growth preservation as it results in largest height gain and better deformity control. FEA model demonstrated that distraction alone is inadequate for controlling rotation, and with increasing apical translation, residual rotation after distraction also increases. Level of Evidence: Level III.
Journal of Pediatric Orthopaedics

Suggestions

The mediator role of perceived social support in the relationship between difficulties in emotion regulation and suicide tendency
Demir, Berkan; Sümer, Zeynep (2022-01-01)
© 2022, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.While literature maintained a strong association between emotion regulation skills and suicidal behavior, relatively less is known as to what extent this relationship goes through different dimensions of perceived social support. The purpose of the present study is to examine the possible mediator role of divergent aspects of perceived social support (family, friends, and significant other) in the...
The predictive relationship between self-efficacy levels of english teachers and language teaching methods İngilizce öğretmenlerinin öz yeterliklerinin, kullandıkları dil öğretim yöntemini yordayıcılığı
Kaygisiz, Semih; ANAGÜN, ŞENGÜL SAİME; Karahan, Engin (2018-01-01)
© 2018 Ani Publishing Ltd. All rights reserved.Purpose: Considering that self-efficacies of teachers can affect their educational and instructional applications, it is probable that self-efficacies of English teachers can predict the language teaching methods they employ. In this sense, the purpose of the study was to investigate the correlation between self-efficacies of English teachers and language teaching methods they employ. Method: This study used quantitative correlational design. 367 English langua...
An Eye Tracking Based Investigation of Multimedia Learning Design in Science Education Textbooks
Altan, Tugba; Çağıltay, Kürşat (2022-01-01)
© 2022. Educational Technology and Society. All Rights Reserved.This study investigated the effects of multimedia learning and visual design in a 6th grade science textbook on students’ studying processes. This was accomplished by using eye tracking technology and by applying multimedia learning design and visual design principles to science textbooks. Eye tracking based testing was employed to evaluate the effects of multimedia learning and visual design principles on students’ studying process as they int...
Frame finite element model for nonlinear and vibration analysis of steel structures with Beam-Column and Column-Base Semi-Rigid Connections Kiriş-Kolon ve Kolon-Taban Yari-Rijit baǧlantili çelik yapilarin doǧrusal olmayan ve titreşim analizleri için çerçeve sonlu elemani modeli
Özel, Halil Firat; Sarıtaş, Afşin (2022-01-01)
© 2022 Gazi Universitesi Muhendislik-Mimarlik. All rights reserved.In this paper, a shear deformable force-based frame finite element with semi-rigid connections is derived for nonlinear analysis of steel structures. Distributed plasticity approach is defined along element length and section depth, and linear or non-linear semi-rigid connection behavior can be specified anywhere along elements without the necessity to define additional nodes and to increase the degrees of freedom of the structural system. T...
Development of a three-dimensional basin model to evaluate the site effects in the tectonically active near-fault region of Gölyaka basin, Düzce, Turkey
Yousefi-Bavil, Karim; KOÇKAR, MUSTAFA KEREM; Akgün, Haluk (2022-01-01)
© 2022, The Author(s), under exclusive licence to Springer Nature B.V.The high seismicity and tectonic activity of the study area located in a near-fault region in Gölyaka, Düzce, results in a bedrock geometry highly complex in the sense of faulting and deformation. This makes this area very challenging in terms of a site response study that would aid seismic hazard assessment. This study develops a basin model to evaluate the site effects in the tectonically formed Plio-Quaternary fluvial sedimentary layer...
Citation Formats
G. DURSUN et al., “The Effect of Apical Vertebra Position on Growing Rod Treatment: A Clinical and Finite Element Study,” Journal of Pediatric Orthopaedics, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85129155447&origin=inward.