HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >

Relationship of forces acting on implant rods and degree of scoliosis correction

Files in This Item:
HUSCAP040113.pdf433.86 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Relationship of forces acting on implant rods and degree of scoliosis correction
Authors: Salmingo, Remel Alingalan Browse this author
Tadano, Shigeru Browse this author →KAKEN DB
Fujisaki, Kazuhiro Browse this author
Abe, Yuichiro Browse this author
Ito, Manabu Browse this author
Keywords: Adolescent idiopathic scoliosis
Screw density
Rod deformation
Corrective force
Issue Date: Feb-2013
Publisher: Elsevier
Journal Title: Clinical biomechanics
Volume: 28
Issue: 2
Start Page: 122
End Page: 128
Publisher DOI: 10.1016/j.clinbiomech.2012.12.001
PMID: 23273729
Abstract: Background: Adolescent idiopathic scoliosis is a complex spinal pathology characterized as a threedimensional spine deformity combined with vertebral rotation. Various surgical techniques for correction of severe scoliotic deformity have evolved and became more advanced in applying the corrective forces. The objective of this study was to investigate the relationship between corrective forces acting on deformed rods and degree of scoliosis correction. Methods: Implant rod geometries of six adolescent idiopathic scoliosis patients were measured before and after surgery. An elasto-plastic finite element model of the implant rod before surgery was reconstructed for each patient. An inverse method based on Finite Element Analysis was used to apply forces to the implant rod model such that it was deformed the same after surgery. Relationship between the magnitude of corrective forces and degree of correction expressed as change of Cobb angle was evaluated. The effects of screw configuration on the corrective forces were also investigated. Findings: Corrective forces acting on rods and degree of correction were not correlated. Increase in number of implant screws tended to decrease the magnitude of corrective forces but did not provide higher degree of correction. Although greater correction was achieved with higher screw density, the forces increased at some level. Interpretation: The biomechanics of scoliosis correction is not only dependent to the corrective forces acting on implant rods but also associated with various parameters such as screw placement configuration and spine stiffness. Considering the magnitude of forces, increasing screw density is not guaranteed as the safest surgical strategy.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 但野 茂

Export metadata:

OAI-PMH ( junii2 , jpcoar )

MathJax is now OFF:


 - Hokkaido University