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ID 109984
Title Alternative
脊椎椎弓根スクリュー誤挿入後,再挿入を行った際の引き抜き強度についての研究
Author
Goda, Yuichiro Tokushima University
Toki, Shunichi Tokushima University
Suzuki, Daisuke Sapporo Medical University
Kobayashi, Takuma Sapporo Medical University
Fujimiya, Mineko Sapporo Medical University
Hutton, Williams C. Emory University
Keywords
malpositioned screw
pedicle screw
pullout strength
redirected screw
thoracolumbar spine
Content Type
Thesis or Dissertation
Description
Screw malposition, such as lateral wall breach or end-plate breach, is one of the main pitfalls of inserting pedicle screws.
Methods: From 17 fresh spines 54 vertebrae were harvested. In each vertebra on one pedicle the screw was inserted correctly down the axis of the pedicle, while on the other pedicle the screw was inserted to breach the lateral wall or the end-plate. The 18 pedicle screws that breached the lateral wall were then removed and re-directed along the correct axis of the pedicle. The 18 pedicle screws that breached the end-plate were removed and re-directed along the correct axis of the pedicle. The 18 other pedicle screws that had breached the end-plate were not removed. The pullout force of pedicle screws was measured.
Results: 1) The mean pullout strength for the re-directed screws following lateral wall breach was 24.0% less as compared to the correctly aligned screws; 2) The mean pullout strength for the re-directed screws following end-plate breach was 23.3% less as compared to the correctly aligned screws; 3) The mean pullout strength for the pedicle screws end-plate breach was 7.6% less as compared to the correctly aligned screws.
Conclusion: The pullout strength of re-directed pedicle screws after either a lateral pedicle breach or end-plate breach is significantly less than the pullout strength of correctly aligned screw. A pedicle screw that is not re-directed after end-plate breach is weaker than a pedicle screw correctly aligned, however the difference is not significant.
Journal Title
Spine
ISSN
03622436
NCID
AA0084801X
AA12431865
Publisher
Wolters Kluwer
Volume
41
Issue
15
Start Page
1218
End Page
1223
Published Date
2016-08-01
Remark
内容要旨・審査要旨・論文本文の公開:
内容要旨・審査要旨 : LID201701051001.pdf
論文本文 : k2996_fulltext.pdf
本論文は, 著者Yuichiro Godaの学位論文として提出され, 学位審査・授与の対象となっている。
Rights
Copyright: © 2016. Wolters Kluwer Health, Inc.
This manuscript version is made available under the CC-BY-NC 4.0 license http://creativecommons.org/licenses/by-nc/4.0/
EDB ID
DOI (Published Version)
URL ( Publisher's Version )
FullText File
language
eng
TextVersion
ETD
MEXT report number
甲第2996号
Diploma Number
甲医第1301号
Granted Date
2016-10-27
Degree Name
Doctor of Medical Science
Grantor
Tokushima University
departments
University Hospital
Medical Sciences