Biomechanical analysis of immediately loaded implants according to the "All-on-Four" concept.

• Material Type: 博士論文
• Title: Biomechanical analysis of immediately loaded implants according to the "All-on-Four" concept.
• Author/Editor: Horita, Satoshi; Sugiura, Tsutomu; Yamamoto, Kazuhiko; Murakami, Kazuhiro; Imai, Yuichiro; Kirita, Tadaaki
• Author Heading: Horita, Satoshi; Sugiura, Tsutomu; Yamamoto, Kazuhiko; Murakami, Kazuhiro; Imai, Yuichiro; Kirita, Tadaaki
• Publication, Distribution, etc.: Elsevier
• Publication Date: 2016-09-05
• Publication Date (W3CDTF): 2016-09-05
• Alternative Title: “All-on-Four”コンセプトに基づいて即時荷重を適用したインプラントの力学解析
• Periodical title: Journal of prosthodontic research
• No. or year of volume/issue: 61 2
• Volume: 61
• Issue: 2
• Pages: 123-132
• ISSN (Periodical Title): ISSN : 1883-1958
• Degree grantor/type: 奈良県立医科大学
• Date Granted: 2017-03-15
• Dissertation Number: 乙第1398号
• Degree Type: 博士（医学）
• Text Language Code: eng
• Subject Heading: All-on-Four concept; Finite element analysis; Immediate loading; Cantilever loading; Framework material
• Target Audience: 一般
• Note (General): type:Thesis; PURPOSE: The purpose of this study was to investigate the biomechanical behavior of immediately loaded implants in an edentulous mandible according to the "All-on-Four" concept. METHODS: A 3D-finite element model of an edentulous mandible was constructed. Four implants were placed between the bilateral mental foramen according to "All-on-Four" concept. A framework made of titanium or acrylic resin between the bilateral first molars was modeled. Immediate loading and a delayed loading protocol were simulated. A vertical load of 200N was applied at the cantilever or on the abutments region of the distal implants, simulating the absence of a cantilever. RESULTS: The peak principal compressive strains in the immediate loading models resulted in 24.0-35.8% and 26.4-39.0% increases compared with the delayed loading models under non-cantilever loading and cantilever loading, respectively. The loading position greatly affected the principal compressive and tensile strain values. The peak principal compressive strains in non-cantilever loading resulted in a 45.3-52.6% reduction compared with those in cantilever loading. The framework material did not influence the peak compressive and tensile strain. The maximum micromotion at the bone-implant interface in the immediate loading models was 7.5-14.4μm. CONCLUSIONS: Mandibular fixed full-arch prostheses without cantilevers may result in a favorable reduction of the peri-implant bone strain during the healing period, compared with cantilevers. The maximum micromotion was within the acceptable limits for uneventful implant osseointegration in the immediate loading models. Framework material did not play an important role in reducing the peri-implant bone strain and micromotion at the bone-implant interface.; 博士（医学）・乙第1398号・平成29年3月15日; Copyright © 2017 The Authors. Published by Elsevier Ltd on behalf of Japan Prosthodontic Society. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).; identifier:Journal of prosthodontic research Vol.61 No.2 p.123-132 (2017 Apr); identifier:18831958; identifier:http://ginmu.naramed-u.ac.jp/dspace/handle/10564/3331; identifier:Journal of prosthodontic research, 61(2): 123-132
• Access Restrictions: インターネット公開
• Related Material (DOI): 10.1016/j.jpor.2016.08.002
• 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): 奈良県立医科大学 : 奈良県立医科大学機関リポジトリ GINMU

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http://ginmu.naramed-u.ac.jp/dspace/bitstream/10564/3331/1/01_%e4%b9%991398%e6%9c%ac%e6%96%87%e3%81%ae%e8%a6%81%e6%97%a8.pdf fulltext

http://ginmu.naramed-u.ac.jp/dspace/bitstream/10564/3331/2/02_%e4%b9%991398%e5%af%a9%e6%9f%bb%e8%a6%81%e6%97%a8.pdf fulltext

http://ginmu.naramed-u.ac.jp/dspace/bitstream/10564/3331/13/03_%e4%b9%991398%e6%9c%ac%e6%96%87.pdf fulltext