直近一年間の累計
アクセス数 : ?
ダウンロード数 : ?
ID 114709
タイトル別表記
椎弓根スクリューの椎弓根外側、内側に誤挿入後再挿入した際の引き抜き強度
Pullout Strength of Pedicle Screws
著者
前田, 徹 徳島大学大学院医科学教育部(医学専攻)
林, 二三男 Tokushima University
合田, 有一郎 Tokushima University
キーワード
larger screw
malpositioned screw
pedicle screw
pullout strength
redirection
thoracolumbar spine
資料タイプ
学位論文
抄録
Study Design: A cadaveric biomechanical study designed to test the pullout strength of pedicle screws.
Objective: To evaluate the pullout strength of redirected pedicle screws with a larger diameter following lateral wall breach, redirected pedicle screws of the same diameter following medial wall breach, and redirected pedicle screws with a larger diameter following medial wall breach. Summary of Background Data: Screw malposition is one of the main pitfalls of inserting pedicle screws. Intraoperatively a malpositioned screw is re-directed and inserted along the correct axis.
Methods: Forty-seven vertebrae (T9–L5) were harvested from 8 fresh cadaveric spines. The 18 pedicle screws that breached the lateral wall were then removed and redirected using a pedicle screw of 1 mm larger in diameter. The 16 pedicle screws that had breached the medial wall were then removed and redirected using a pedicle screw of the same diameter. The other 13 pedicle screws that had breached the medial wall were then removed and redirected using a pedicle screw of 1 mm larger in diameter. The pullout strength was measured.
Results: Following lateral wall breach, mean pullout strength for the larger redirected screws was 46.9% greater than that of the correctly aligned screws. Following medial wall breach, mean pullout strength for the redirected screws of the same diameter was 20.6% less than that of the correctly aligned screws. Mean pullout strength for the larger pedicle screws following medial wall breach was 27.3% more than that of the correctly aligned screws.
Conclusion: Redirected pedicle screws of larger diameter after a lateral or medial pedicle breach show recovery of pullout strength. However, the pullout strength of redirected pedicle screws of the same diameter after a medial pedicle breach is significantly less than that of correctly aligned screws.
抄録別表記
Redirected pedicle screws of larger diameter after a lateral or medial pedicle breach show the recovery of pullout strength. However, the pullout strength of redirected pedicle screws of the same diameter after a medial pedicle breach is significantly less than that of correctly aligned screws.
掲載誌名
Spine
ISSN
03622436
15281159
cat書誌ID
AA0084801X
AA12431865
出版者
Lippincott Williams & Wilkins|Wolters Kluwer Health, Inc.
43
17
開始ページ
E983
終了ページ
E989
発行日
2018-09-01
備考
内容要旨・審査要旨・論文本文の公開
本論文は,著者Toru Maeda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。
権利情報
This the final peer-reviewed manuscript is made available under the CC-BY-NC 4.0 license (http://creativecommons.org/licenses/by-nc/4.0/)
EDB ID
出版社版DOI
出版社版URL
フルテキストファイル
言語
eng
著者版フラグ
博士論文全文を含む
文科省報告番号
甲第3372号
学位記番号
甲医第1455号
学位授与年月日
2020-03-23
学位名
博士(医学)
学位授与機関
徳島大学
部局
医学系
病院