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Load Transfer of abutment tooth with post and core for Various mandibular distal extension cases with diminished periodontal support

Research Project

Project/Area Number 15592043
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 補綴理工系歯学
Research InstitutionTohoku University

Principal Investigator

ITOH Hidemi  Tohoku University, Graduate School of dentistry, Lecturer, 大学院・歯学研究科, 講師 (50005104)

Co-Investigator(Kenkyū-buntansha) KOMATU Masashi  Tohoku University, Graduate School of dentistry, Professor, 大学院・歯学研究科, 教授 (10005069)
ENDO Hideaki  Tohoku University, Graduate School of dentistry, Research assosiate, 大学院・歯学研究科, 助手 (80168830)
SATO Masaaki  Tohoku University, Graduate School of Enginer, Professor, 大学院・工学研究科, 教授 (30111371)
SASAKI Tomofumi  Tohoku University, Hospital, Research assosiate, 病院・助手 (40323034)
MASUDA Yoshiharu  Saitama Institute of Technology, Professor, 工学部, 教授 (20118673)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2004: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2003: ¥1,500,000 (Direct Cost: ¥1,500,000)
KeywordsMadibular Distal Extention Denture / Abutment tooth / Post and Core / Retainer / Periodontally Compromised / Quasi-three Dimentional photoelastic Method / High-speed Photoelastic Experimental Method / Finite Element Method / 側方加圧根充 / 光弾性法 / ポストコア / 高速光弾性実験法
Research Abstract

The purpose of this study was to investigate the stress redistribution in the pulp and non-pulp abutments in bilateral and unilateral distal extension cases with reduced periodontal support of three retainers device configurations based on the RPI system, Konus Krone system, and Bracing arm system using Quasi-three-dimensional Photoelastic method, High-speed Photoelastic Experimental Method and Finite Element Method.
Three composite photoelastic models were made of a mandible unilaterally and bilateral edentulous distal to the second premolars. Individual simulant materials were used for tooth structure, periodontal ligament, and alveolar bone of periodontally compromised. Three retainers were cast for the teeth. Unilateral and bilateral partial dentures with three retainer designs, RPI system, Konus Krone system and Bracing arm system were made for the three models. Simulated vertical and lateral occlusal loads were applied to the dentures, and the stresses which developed in the suppo … More rting structures were monitored photoelastically.
As a results, it's became clear the following. 1)The stress redistribution patterns in the abutments and surrounding tissues differed between the three systems. 2)The RPI system configurations showed the most uniform redistributions across loads directed in all five directions, while Konus Crone systems showed favorable stress redistribution for vertically, posteriorly, and buccally directed loads and Bracing arms configurations showed favorable stress redistribution for anteriorly and lingually directed loads. 3)the highest stress concentrations were seen in the abutment with the least periodontal support : the 35% horizontal defect. Increasing the number of splinted teeth did not provide a proportional decrease in maximum stress levels. 4)higher stress concentrations were seen in the abutment of non-pulp with post metal core. 5)The differents stress developed by lateral condensation root canal filling using various sizes spreddar. 6)it's became same results both Quasi-three-dimensional Photoelastic Method and Finite Element Method. Less

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (23 results)

All 2004 2003 Other

All Journal Article (17 results) Publications (6 results)

  • [Journal Article] 歯根破折と支台歯・支台装置2004

    • Author(s)
      佐々木 具文
    • Journal Title

      日本実験力学会講演論文集 4-2

      Pages: 38-42

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 歯根破折と根菅治療2004

    • Author(s)
      遠藤 英昭
    • Journal Title

      日本実験力学会講演論文集 4-2

      Pages: 28-30

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 各種支台装置を用いた下顎片側性遊離端義歯の荷重伝達特性2004

    • Author(s)
      伊藤 秀美
    • Journal Title

      顎咬合誌 24

      Pages: 33-41

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 8020運動とバイオメカニクス 第一回 バイオメカニクスとは2004

    • Author(s)
      伊藤 秀美
    • Journal Title

      QDT 29

      Pages: 52-59

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 8020運動とバイオメカニクス 第二回 クラトビルとI・バーシステム2004

    • Author(s)
      伊藤 秀美
    • Journal Title

      QDT 29

      Pages: 50-64

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Biomechanical Comparison of Straight and Staggered Implant Placement Configuration2004

    • Author(s)
      Itoh Hidemi
    • Journal Title

      Int J Periodontics Restorative dent 24

      Pages: 3-12

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] In Search of Root-Fracture-Free Foundation Restorations2004

    • Author(s)
      Kuroe Toshifumi, Itoh Hidemi
    • Journal Title

      The Quintessence Vol.23. No.1

      Pages: 55-63

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Root furacture and Clinical cases.2004

    • Author(s)
      Endo Hideaki, Itoh Hidemi
    • Journal Title

      The Quintessence Vol.23. No.1

      Pages: 64-71

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Stress analysis for apical root fracture2004

    • Author(s)
      Endo Hideaki, Itoh Hidemi
    • Journal Title

      Proceeding of JSEM. No4-4

      Pages: 32-34

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Study of Biomechanics on Stress Developed by Lateral Condensation Root Filling Technique.2004

    • Author(s)
      Yamazaki Yoshimasa, Endo Hideaki, Itoh Hidemi
    • Journal Title

      Proceeding of JSEM. No4-4

      Pages: 35-37

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Biomechanics and 8020Movement Part2 : The concept and basic research of Kratochivil's I-bar System.2004

    • Author(s)
      Itoh hHidemi, Sasaki Tomofumi
    • Journal Title

      QDT Vol29, No12

      Pages: 50-64

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 各種支台装置を用いた下顎片側性遊離端義歯の荷重伝達特性2004

    • Author(s)
      伊藤秀美
    • Journal Title

      顎咬合誌 第24巻

      Pages: 33-41

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 8020運動とバイオメカニクス・第1回バイオメカニクスとは2004

    • Author(s)
      伊藤秀美
    • Journal Title

      QDT Vol.29

      Pages: 52-59

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 8020運動とバイオメカニクス・第2回クラトビルのエバーシステム2004

    • Author(s)
      伊藤秀美
    • Journal Title

      QDT Vol.29

      Pages: 50-64

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 歯根破折と治療2004

    • Author(s)
      遠藤英昭
    • Journal Title

      日本実験力学会講演論文集 4-2

      Pages: 28-30

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 歯根破折と支台歯・支台装置2004

    • Author(s)
      佐々木具文
    • Journal Title

      日本実験力学会講演論文集 4-2

      Pages: 38-42

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 支台歯・歯根破折の予防-各種下顎遊離端欠損・支台歯のバイオメカニクス-2003

    • Author(s)
      伊藤 秀美
    • Journal Title

      日本実験力学会講演論文集 3-1

      Pages: 64-69

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] 伊藤 秀美: "ワイドな直径インプラントを含む教舌的オフセット配置の荷重伝達特性"日本実験力学会講演論文集・2003年次講演会. 3. 153-155 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 佐々木 具文: "クラトビルとクロールのRPIクラスプ・支台歯の光弾性応力解析"日本実験力学会講演論文集・2003年次講演会. 3. 153-155 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 伊藤 秀美: "支台歯・歯根破折の予防-各種下顎遊離端欠損・支台歯のバイオメカニクス-"日本実験力学会講演論文集. 3-1. 64-69 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 遠藤 英昭: "歯根破折とその臨床"ザ・クインテッセンス. 23-1. 64-71 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Hidemi Itoh: "Biomechanical Comparison of Straight and Staggered Implant P1 acement Configurations"The International Journal of Periodontics & Restorative Dentistry. 24-1. 47-55 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 伊藤 秀美: "歯根破折を起こしにくい支台築造を求めて"ザ・クインテッセンス. 23-1. 55-63 (2004)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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