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 >

Corrective force analysis for scoliosis from implant rod deformation

Files in This Item:
CB27_545-550.pdf1.33 MBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/49633

Title: Corrective force analysis for scoliosis from implant rod deformation
Authors: Salmingo, Remel 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: Biomechanics
Scoliosis
Rod deformation
Finite element analysis
Issue Date: Jul-2012
Publisher: Elsevier
Journal Title: Clinical Biomechanics
Volume: 27
Issue: 6
Start Page: 545
End Page: 550
Publisher DOI: 10.1016/j.clinbiomech.2012.01.004
PMID: 22321374
Abstract: Background: Scoliosis is a serious disease in which a human spine is abnormally deformed in three dimensions with vertebral rotation. Surgical treatment is attained when the scoliotic spine is corrected into its normal shape by implant rods and screws fixed into the vertebrae. The three-dimensional corrective forces acting at the screws deformed the implant rod during the surgical treatment of scoliosis. The objective of this study was to propose a method to analyze the three-dimensional forces acting at the rod using the changes of implant rod geometry before and after the surgical treatment. Methods: An inverse method based on Finite Element Analysis is proposed. The geometries of implant rod before and after the surgical treatment were measured three dimensionally. The implant rod before the surgical treatment was reconstructed using an elasto-plastic finite element model. The three-dimensional forces were applied iteratively to the rod through the screws such that the rod is deformed the same after the surgical treatment of scoliosis. Findings: The maximum force acting at the screw of each patient ranged from 198 N to 439 N. The magnitude of forces was clinically acceptable. The maximum forces occurred at the lowest fixation level of vertebra of each patient. Interpretation: The three-dimensional forces distribution that deformed the rod can be evaluated using the changes of implant geometry. Although the current clinical cases are still few, this study demonstrated the feasibility of measuring the forces that deformed the implant rod after the surgical treatment of scoliosis.
Type: article (author version)
URI: http://hdl.handle.net/2115/49633
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