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AN ANALITICAL EVALUATION OF PERIODONTAL TISSUE CHANGE WITH DAMPED OSCILLATION OF TEETH.

Research Project

Project/Area Number 04404074
Research Category

Grant-in-Aid for General Scientific Research (A)

Allocation TypeSingle-year Grants
Research Field Conservative dentistry
Research InstitutionNIHON UNIVERSITY

Principal Investigator

SAITO Tsuyoshi  NIHON UNIVERSITY.SCHOOL OF DENTISTRY.PROFESSOR, 歯学部, 教授 (60059235)

Co-Investigator(Kenkyū-buntansha) MORIKAWA Yosinori  NIHON UNIVERSITY SCHOOL OF TECHNOLOGY.INSTRACTOR, 理工学部, 助手 (60239639)
YAMAMOTO Hirosi  NIHON UNIVERSITY.SCHOOL OF TECHNOLOGY.ASS.PROF., 理工学部, 助教授 (90130632)
YAMAOKA Masaru  NIHON UNIVERSITY.SCHOOL OF DENTISTRY.INSTRACTOR, 歯学部, 助手 (60182408)
KOMORI Noroo  NIHON UNIVERSITY.SCHOOL OF DENTISTRY.INSTRACTOR, 歯学部, 助手 (60153681)
田中 正一   (70058600)
Project Period (FY) 1992 – 1994
Project Status Completed (Fiscal Year 1994)
Budget Amount *help
¥22,000,000 (Direct Cost: ¥22,000,000)
Fiscal Year 1994: ¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1993: ¥6,000,000 (Direct Cost: ¥6,000,000)
Fiscal Year 1992: ¥13,000,000 (Direct Cost: ¥13,000,000)
KeywordsTooth mobility / Damped oscillation / Elastic constants / Viscositic constants / Periodontal disease / Tooth shape / 減数固有振動数 / 振動解析測定システム / 動揺 / 数量化 / 歯周組織疾患
Research Abstract

In particular, the measurement of tooth mobility is concidered a majior technique for demonstrating the conditions and functions of periodontal tissue directly.
The aim of this study is to establish a new method to evaluate periodontal tissue characteristics objectively, including tooth mobility. In advance of clinical study, it used artificial tooth model with adjustable root tapers and thickness of a shock-absorbing material around the root. Factors investngated included individual damped oscillation, elastic constants, viscositic constants and the ratio of the elastic and viscositic constant. The data were used to explore whether they contribute to objective evaluation of the characteristics of periodontal tissue. The results were as follows :
(1) These were obtained from analysis of the wave forms selected on an accelemeter when the tooth model was loaded horizontally and vertically.
(2) A theoretical formula of the accelation was derived, and the elastic and viscositic constants were considered with regard to clinical use.
(3) In cases of both horizontal and vertical loding, individual damped oscillation, elastic constants, viscositic constants and the ratio of the elastic and viscositic constants showed a tendency to decrease as the taper of the root increased.
(4) In case of vertical loding, the value of individual damped oscillation, elastic constants, viscositic constants and the ratio of the elastic and viscositic constants decreased as the thickness of the shock absorbing material on the botom of root increased.

Report

(4 results)
  • 1994 Annual Research Report   Final Research Report Summary
  • 1993 Annual Research Report
  • 1992 Annual Research Report
  • Research Products

    (9 results)

All Other

All Publications (9 results)

  • [Publications] 前田圭司 他: "歯の動的振動解析に関する基礎的研究、とくに円錐歯根への加振とその減衰固有振動について" 日本歯科保存学会誌. 37(春季). 35 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 前田圭司 他: "歯の動的振動解析に関する基礎的研究、とくに円錐形歯根模型に対する垂直槌打による減衰固有振動について" 日本歯科保存学会誌. 37(秋期). 79 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 前田圭司: "歯の減衰振動を指標とした歯周組織に関する研究、とくに円柱模型に対する加振とその減衰固有振動について" 日本歯科保存学会誌. 38(2)(掲載予定). (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] MAEDA,KEIJI et al: "Analitical study of Periodontal Tissue with Damped Oscillation of Teeth by Vertical Loading." Japan J.Conserv.Dent.37 (spring ed). 35- (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] MAEDA,KEIJI et al: "Analitical study of Periodontal Tissue with Damped Oscillation of Teeth in the case of Taperd Root Model." Japan J.Conserv.Dent.38 (autum ed). 79- (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] MAEDA,KEIJI: "An Evaluation of Periodontal Tissue with Damped Oscillation of Teeth - The Effect of Root Taper and the Thickness of Shock-absorbing Material in a Tooth Model-" Japan J.Conserv.Dent.38 (2), (1995 on print).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1994 Final Research Report Summary
  • [Publications] 前田 圭司他: "歯の動的振動解析に関する基礎的研究(減衰固有振動について)" 日本歯科保存学会誌. :37(春季). 35- (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 前田 圭司: "歯の動的振動解析に関する基礎的研究(円錐歯根への垂直槌打について)" 日本歯科保存学会誌. 37(秋季). 79- (1994)

    • Related Report
      1994 Annual Research Report
  • [Publications] 前田 圭司: "歯の減衰振動を指標とした歯周組織に関する研究" 日本歯科保存学会誌. 38(2)(掲載予定). (1995)

    • Related Report
      1994 Annual Research Report

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Published: 1992-04-01   Modified: 2016-04-21  

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