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.
journal_name
Med Biol Eng Computjournal_title
Medical & biological engineering & computingauthors
Kim HJ,Chun HJ,Moon SH,Kang KT,Kim HS,Park JO,Moon ES,Sohn JS,Lee HMdoi
10.1007/s11517-010-0621-2subject
Has Abstractpub_date
2010-07-01 00:00:00pages
703-9issue
7eissn
0140-0118issn
1741-0444journal_volume
48pub_type
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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journal_title：Medical & biological engineering & computing
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