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Design Optimization of Denture Prostheses by Fatigue Evaluation System

Research Project

Project/Area Number 16591936
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 InstitutionTokyo Medical and Dental University

Principal Investigator

WAKABAYASHI Noriyuki  Tokyo Medical and Dental University, Dental Hospital, Research Associate, 歯学部附属病院, 助手 (00270918)

Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2005: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2004: ¥2,800,000 (Direct Cost: ¥2,800,000)
Keywordsdenture / fracture / stress / fatigue / finite analysis / prosthodontic design / dental implant / expected life of prosthesis / レジン / ひずみ / 歯
Research Abstract

This project was conducted to develop a design optimization system of dental prostheses including removable dentures and implant prostheses based on the evaluation of fatigue resistance. The prosthodontic design was optimized to minimize the fatigue fracture and failures in the long term clinical use of the dentures.
Three categories of investigations were conducted ; 1) Fractographic analysis of clinically failed removable dentures and implant prostheses, 2) Mechanical analysis by means of finite element models of clinically failed removable dentures and implant prostheses, and 3) Fatigue tests of the removable denture and implant materials, and subsequent investigation of the correlation of the results with clinically failed dentures. In the study 2, stress distributions created in the structural components of the removable dentures and implant prostheses such as rest, major and minor connectors, clasps, interfacial region between the resin and the metal, implant neck, and implant superstructures, were analyzed by means of standardized finite element models. It was indicated in this part of the project that the clinical failure probability was closely related to the maximum tensile stress shown in the models, while the geometry and dimensions of the denture components did not necessarily cause the failure initiation. The result was confirmed by matching verification with the results shown in the study 1. In the study 3, the cause and effect relations of the tensile peak stress in the models with the failure probability of the clinically used dentures were generalized. The results of this comprehensive analysis suggest possibility of establish the design optimization system of dental prostheses based on the fatigue resistance of the denture structures. Detailed results of the analyses have been published as described in the next page. The prosthodontic design should be now systematically executed in line with the design optimization theory indicated in this project.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (18 results)

All 2006 2005 2004 Other

All Journal Article (18 results)

  • [Journal Article] Influence of abutment selection in maxillary Kennedy II RPD on stress distribution in oral mucosa : A FEM study.2006

    • Author(s)
      Wada S
    • Journal Title

      Journal of Prosthodontics 15(1)

      Pages: 1-6

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Fatigue deflection of Ti-6Al-7Nb, Co-Cr, and Gold alloy cast clasps2005

    • Author(s)
      Mahmoud A
    • Journal Title

      J Prosthet Dent 93(2)

      Pages: 183-8

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Stress analysis in the edentulous mandibular bone supporting implant-retained 1-piece or multiple superstructures.2005

    • Author(s)
      Yokoyama S
    • Journal Title

      Int J Oral Maxillofac Implants 20

      Pages: 578-583

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Fatigue deflection of Ti-6Al-7Nb, Co-Cr, and Gold alloy cast clasps.2005

    • Author(s)
      Mahmoud A, Wakabayashi N, Takahashi H, Ohyama T.
    • Journal Title

      J Prosthet Dent 93(2)

      Pages: 183-188

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Stress analysis in the edentulous mandibular bone supporting implant-retained 1-piece or multiple superstructures.2005

    • Author(s)
      Yokoyama S, Wakabayashi N, Shiota M, Ohyama T.
    • Journal Title

      Int J Oral Maxillofac Implants 20

      Pages: 578-583

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Fatigue deflection of Ti-6Al-7Nb, Co-Cr, and Gold alloy cast clasps.2005

    • Author(s)
      Mahmoud A
    • Journal Title

      Journal of Prosthetic Dentistry 93(2)

      Pages: 183-188

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Stress analysis in the edentulous mandibular bone supporting implant-retained 1-piece or multiple superstructures.2005

    • Author(s)
      Yokoyama S
    • Journal Title

      International Journal of Oral Maxillofacial Implants 20

      Pages: 578-583

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Influence of dimension of Ti-6Al-7Nb and Co-Cr lingualbars on stress peak in underlying oral mucosa.2004

    • Author(s)
      Wada S
    • Journal Title

      Prosthodont Res Pract 3(1)

      Pages: 55-61

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Finite element contact stress analysis of the RPD abutment tooth and periodontal ligament.2004

    • Author(s)
      Muraki H
    • Journal Title

      J Dent 32(5)

      Pages: 659-665

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Deformation properties of Ti-6Al-7Nb alloy castings for removable partial denture frameworks2004

    • Author(s)
      Srimaneepong V
    • Journal Title

      Dent Mater J 23(4)

      Pages: 497-503

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] The influence of implant locations in the three-unit posterior cantilever fixed partial dentures on stress distribution in the supporting mandibular bone.2004

    • Author(s)
      Yokoyama S
    • Journal Title

      J Prosthet Dent 91(3)

      Pages: 234-240

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary 2004 Annual Research Report
  • [Journal Article] Finite element contact stress analysis of the RPD abutment tooth and periodontal ligament.2004

    • Author(s)
      Muraki H, Wakabayashi N, Park I, Ohyama T.
    • Journal Title

      J Dent 32

      Pages: 659-665

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Influence of dimension of Ti-6Al-7Nb and Co-Cr lingual bars on stress peak in underlying oral mucosa.2004

    • Author(s)
      Wada S, Wakabayashi N, Shirasu K, Ohyama T.
    • Journal Title

      Prosthodont Res Pract 3(1)

      Pages: 55-61

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Deformation properties of Ti-6Al-7Nb alloy castings for removable partial denture frameworks.2004

    • Author(s)
      Srimaneepong V, Yoneyama T, Wakabayashi N, Kobayashi E, Hanawa T, Doi H.
    • Journal Title

      Dent Mater J 23(4)

      Pages: 497-503

    • NAID

      110002983825

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Influence of dimension of Ti-6Al-7Nb and Co-Cr lingual bars on stress peak in underlying oral mucosa.2004

    • Author(s)
      Wada S
    • Journal Title

      Prosthodont Res Pract 3(1)

      Pages: 55-61

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effect of cross section shape of metal strengthener on stress distribution in acrylic denture base.2004

    • Author(s)
      Ikeda T
    • Journal Title

      Prosthodont Res Pract 3(1)

      Pages: 1-7

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effect of polymerization shrinkage on the interfacial stress at resin-metal joint in denture-base : A non-linear FE stress analysis.

    • Author(s)
      Ikeda T, Wakabayashi N, Ona M, Ohyama T.
    • Journal Title

      Dent Mater (Accepted in Apr. 2005)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Prediction of permanent deformation in cast clasps for denture prostheses using a validated nonlinear finite element model.

    • Author(s)
      Mahmoud A, Wakabayashi N, Takahashi H.
    • Journal Title

      Dent Mater (Accepted in Nov. 2005)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary

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Published: 2004-04-01   Modified: 2016-04-21  

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