自動埋入型骨固定補助装置を併用した歯科矯正用アンカースクリューの維持力の検討

• Material Type: 博士論文
• Title: 自動埋入型骨固定補助装置を併用した歯科矯正用アンカースクリューの維持力の検討
• Author/Editor: 大賀, 泰彦
• Author Heading: 大賀, 泰彦 オオガ, ヤスヒコ
• Publication, Distribution, etc.: The E. H. Angle Education and Research Foundation
• Publication Date: 2019
• Publication Date (W3CDTF): 2019
• Alternative Title: Evaluation of miniscrew stability using an automatic embedding auxiliary skeletal anchorage device
• Periodical title: Angle Orthodontist
• No. or year of volume/issue: 89 1
• Volume: 89
• Issue: 1
• Pages: 47-53
• Degree grantor/type: 鹿児島大学
• Date Granted: 2019-01-20
• Dissertation Number: 甲総研第489号
• Degree Type: 博士(歯学); Doctor of Philosophy in Dental Science
• Text Language Code: eng
• Subject Heading: Skeletal anchorage; Animal model; Miniscrew
• Target Audience: 一般
• Note (General): 博士論文全文, 最終試験結果の要旨, 論文審査の要旨, 博士論文要旨; Objective: To clarify the in vivo effect of an automatic embedding device on miniscrew stability. Materials and Methods: 42 miniscrews were implanted into rabbit femurs. The miniscrews with the novel auxiliary device formed the auxiliary group (n = 11 at 4 weeks; n = 11 at 8 weeks) and the miniscrews without the auxiliary device formed the nonauxiliary control group (n = 9 at 4 weeks; n = 11 at 8 weeks). Cortical bone thickness, distance from the cortical bone surface to the miniscrew head, and implantation depth of the spike were measured using micro-computed tomography. The mechanical retention force was evaluated by measuring the displacement of the miniscrew head after it was loaded perpendicular to its long axis. In the lateral displacement test, effects of the auxiliary (with vs without auxiliary), and time (4 vs 8 weeks) were assessed using the Brunner–Langer nonparametric analysis of longitudinal data in factorial experiments. Results: The mean implantation depth of the spike in the auxiliary group at 4 and 8 weeks was 0.28mm (median: 0.33; SD: 0.12) and 0.37 mm (median: 0.33; SD: 0.19), respectively. The retention force was approximately 2.0 to 2.8 and 1.6 to 1.8 times greater in the auxiliary group than in the nonauxiliary group at 4 and 8 weeks, respectively. Conclusions: The auxiliary device improved the mechanical retention force without the need to increase miniscrew length or diameter. This may enable the safe use of miniscrews in difficult areas. (Angle Orthod. 2019;89:47–53.)
• Format (IMT): application/pdf
• Access Restrictions: インターネット公開
• Rights (production): © 2019 by The EH Angle Education and Research Foundation, Inc.
• Related Material: URI; https://www.angle.org/loi/angl
• Related Material (DOI): 10.2319/121117-857.1
• Data Provider (Database): 国立情報学研究所 : 学術機関リポジトリデータベース（IRDB）（機関リポジトリ）; https://irdb.nii.ac.jp
• Original Data Provider (Database): 鹿児島大学 : 鹿児島大学リポジトリ

Table of Contents

Result_Oga_Yasuhiko_isk_489_2019 other

Comments_Oga_Yasuhiko_isk_489_2019 other

Diss_大賀_泰彦_ISK489_2018 fulltext

Abstract_大賀_泰彦_4513800030_2018 abstract