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Analysis of biomechanical changes after removal of instrumentation in lumbar arthrodesis by finite element analysis.

Authors
 Ho-Joong Kim  ;  Heoung-Jae Chun  ;  Seong-Hwan Moon  ;  Kyoung-Tak Kang  ;  Hak-Sun Kim  ;  Jin-Oh Park  ;  Eun-Su Moon  ;  Joon-Seok Sohn  ;  Hwan-Mo Lee 
Citation
 MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING, Vol.48(7) : 703-709, 2010 
Journal Title
 MEDICAL & BIOLOGICAL ENGINEERING & COMPUTING 
ISSN
 0140-0118 
Issue Date
2010
MeSH
Biomechanical Phenomena ; Bone Screws ; Device Removal ; Finite Element Analysis ; Humans ; Lumbar Vertebrae/physiopathology ; Lumbar Vertebrae/surgery* ; Male ; Middle Aged ; Models, Biological* ; Range of Motion, Articular ; Spinal Fusion/instrumentation*
Keywords
Adjacent segment degeneration ; Pedicle screws ; Posterolateral fusion ; Finite element method
Abstract
The purpose of this study is to investigate the change in biomechanical milieu following removal of pedicle screws in instrumented single level lumbar arthrodesis. Using a validated finite element (FE) model of the intact lumbar spine (L2-5), two scenarios of L3-4 lumbar fusion were simulated: posterolateral fusion (PLF) at L3-4 using pedicle screws (PLF with pedicle screws; WiP) and L3-4 lumbar posterolateral fusion state after removal of pedicle screws (PLF without pedicle screws; WoP). The WiP model had greater range of motion (ROM) at each adjacent segment than the WoP model. This phenomenon became pronounced at the proximal adjacent segment under flexion moment. Similarly, removal of pedicle screws (the WoP model) relieved the maximal von Mises stress at adjacent segments under 4 moments compared to the WiP model. This study demonstrated that removal of pedicle screws could decrease stiffness of fusion segments, which would reduce the disk stress of adjacent segments
Full Text
http://link.springer.com/article/10.1007%2Fs11517-010-0621-2
DOI
10.1007/s11517-010-0621-2
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Orthopedic Surgery (정형외과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hak Sun(김학선) ORCID logo https://orcid.org/0000-0002-8330-4688
Kim, Ho Joong(김호중)
Moon, Seong Hwan(문성환)
Moon, Eun Su(문은수)
Park, Jin Oh(박진오)
Lee, Hwan Mo(이환모) ORCID logo https://orcid.org/0000-0002-5405-3832
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/102045
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