• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Stress Analysis of Abutments with Reduced Periodontal support of RPDs.

Research Project

Project/Area Number 07672103
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  School of Dentistry, Tohoku University Asociate professor, 歯学部, 講師 (50005104)

Co-Investigator(Kenkyū-buntansha) DATE Kazuhiro  School of Endneer, Tohoku University Professor, 工学部, 教授 (10111254)
Project Period (FY) 1995 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1996: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1995: ¥1,700,000 (Direct Cost: ¥1,700,000)
KeywordsMandibular / Bilsteral Distal Exteusion / Alneolor Defect / Abutment / Photoelastic Mold / Quasi-three-dimensional technique / I-bar clasp / 擬似3次元光弾性法 / 荷重伝達特性 / 鈎歯 / 応力伝達特性 / 下顎両側性遊離端義歯 / 歯周疾患をもつ鉤歯 / レスト付2腕鉤 / I.バ-クラプト
Research Abstract

Prosthodontic cases involving periodontally compromised teeth will increase with a rapidly aging population. The need for an understanding of biomechanical considerations is especially great when designing treatment for periodontally compromised distal extension cases. An examination of load transfer characteristics of abutments and supporting structures in mandibular situations with a variety of periodontal defects was planned. The purpose of this study was to attain information vital to developing new guidelines for partial denture designs with an emphasis on preserving the abutment tceth as long as possible.
In this study, 1) a new stress-analysis system was developed by adding to and improving on observation and recording techniques used in conventional Quasi-Three Dimensional Photoelastic methods of examining stress distribution characteristics in complex situations, and 2) photoclastic models were made to simulate various condition and stresses in the teeth and supporting structur … More es were analyzed. Specifically, models of i) unilateral distal extension cases (432 remaining) with various vertical and horizontal resorption (crater and trough defects for vertical resorption, and horizontal resorption rates of 20% and 35% were used), as well as ii) bilateral distal extension situations with vertical resorption in the first premolar abutment were fabricated. These models were tested against chromatic fringe patterns observed in models of a normal mandibular situation for their load transfer characteristics as load (quantity and direction), splinting, and retention device conditions were changed.
The results showed that, 1) under the same load conditions, the highest stresses over the largest area developed in the model with the largest osseous defect, 2) stress distribution patterns were fundamentally different in models with vertical versus those with horizontal periodontal resorption, 3) two splints were most effective in redistributing loads incurred by periodontally compromised abutment teeth, and 4) the lbar clasp was the most effective in reducing the overall stress at the abutment tooth and producing an uniform stress redistribution. Less

Report

(3 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] 伊藤秀美: "歯科臨床とバイオメカニクス-部分床義歯の新しいガイドラインを求めて-" ザ・クインラッセンス(QE). Year Book. 39-44 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.ITOH: "Effect of Peridontol Support and Fixed Sprinting on load tunsfer by RPD" Jonal of Prosthetic Dentistry. (投稿中). (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] ITOH.H: "Removsble Partial Detme Designs in Periodoutslly Carprouised Mandible" Jounsl of Dentel Research. 74. 105 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] ITOH.H: "Cross Arch Interaction of Distsl Extension RPDs with Abutments" Jounsl of Dentel Research. 75. 269 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Nakahara H: "Biomechanics Corpdrisn of Kratochil and Kel I・ban PD Systen" Jounsl of Dentel Research. 76. 293 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 伊藤秀美: "連結歯数の変化に対する歯槽骨欠損をもつ部分床義歯鉤歯の先弾性応力解析" 顎顔面バイオメカニクス学会誌. 第3回学分大会. 8-9 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] A・A・Caputo.J.P.Stand lee: "歯科臨床とバイオメカニクス" 監訳 伊藤秀美 伊達和博, 253 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hidemi Itoh: "Biomechaice in Clinical Dentistry" Year Book. 39-44 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.ITOH: "Effect of Periudental Supporf and Fixed Sphinting on lond fransfer by RPD" J.P.D. (in press). (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.ITOH: "Removable Partial Denture in Periodontrlly Compromised Mandible" J.D.R. 105. 74 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.ITOH: "Cross Arch Interaction of Distal Extansion RPDs with Abutments" J.D.R. 269. 75 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] H.Nakahara: "Biomechanics Conparison of Krafochoil and Krol I-ban P D Systems." J.D.R. 293. 76 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Hidemi.I: "Stress Analysis of Periodontally Involved RPD Abatments under Vorions Splinting Cordifims" A.O.R. 3. 4-5 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] ITOH. H: "Cross-Arch Interaction of Distal Extension RPDs with Abutments" Jounal of Dental Research. 75. 269 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] KUROE. T: "Photoelastic Uisualization of Stress Associated with Lesions" Jounal of Dental Research. 75. 384 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Nakahara. H: "Biomechanical Comparison of Knatochvil and Kvol I-bar" Jounal of Dental Research. 76. 293 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Kuroe. T: "Effect of Diminished Periodontal Support on Cervical Stress" Jounal of Dental Research. 76. 197 (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 平 剛: "種々の歯槽骨欠損を持つ歯および歯槽骨内応力の検討" 日本補綴誌. (学会発表予定). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] 伊藤秀美: "CCD・画像処理システムを応用した擬似3次元法による各種歯槽骨欠損の分析" 日本光弾性誌. (学会発表予定). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Itoh, H.: "Removable Partial Denture design in the Periodoutally Compromise Mandible" Jounal of Dental Research. 74. 482- (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 伊藤秀美: "部分床義歯のための新しいガイドラインを求めて" ザ・クインテッセンス. Year Book. 39-44 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 伊藤秀美: "歯周疾患をもつ部分床義歯の光弾性応力解析-近心および遠心レストの比較" 補綴誌. 39号特別号. 118- (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 伊藤秀美: "連結歯数の変化に対する歯槽骨欠損をもつ部分床義歯鉤歯の光弾性応力解析" 顎顔面バイオメカニクス学会講演. 第3回学術大会. 8-9 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 伊藤秀美: "光弾性実験法による鉤歯とその支持組織の内部応力の検討" ザ・クインテッセンス. vol13.No.6. 3-11 (1994)

    • Related Report
      1995 Annual Research Report
  • [Publications] Itoh, H.: "I-bar retainers for maudibular bilateral distol extension cases" Jounal of Dental Research. 74. 73- (1994)

    • Related Report
      1995 Annual Research Report

URL: 

Published: 1995-04-01   Modified: 2016-04-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi