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The Achievement of the Optimal Force in Experimental Orthodontic Tooth Movement

Research Project

Project/Area Number 08672354
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 矯正・小児・社会系歯学
Research InstitutionHOKKAIDO UNIVERSITY

Principal Investigator

SATO Yoshiaki  Hokkaido Univ., Sch.of Dent., Instructor, 医学部, 助手 (00250465)

Co-Investigator(Kenkyū-buntansha) YOSHIDA Shigemitu  Hokkaido Univ., Sch. of Dent., Prof., 歯学部, 教授 (80174928)
YAMAMOTO Katsuyuki  Hokkaido Univ., Fac. of Eng., Prof., 工学部, 教授 (10088867)
WAKITA Minoru  Hokkaido Univ., Sch.of Dent., Prof., 歯学部, 教授 (40018916)
NAKAMURA Shinji  Hokkaido Univ., Sch.of Dent., Prof., 歯学部, 教授 (80001791)
ISHIKAWA Hiroyuki  Hokkaido Univ., Dental Hospital, Lecturer, 歯学部附属病院, 講師 (20184492)
Project Period (FY) 1996 – 1997
Project Status Completed (Fiscal Year 1997)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 1997: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 1996: ¥900,000 (Direct Cost: ¥900,000)
KeywordsTooth Movement / Degenerated Tissue / Periodontal Ligament / Stress Analysis / Tissue Response / Rear Bone Resorption / 応力分布 / 有限要素法 / 組織変化
Research Abstract

The purpose of this sutdy is to investigate the optimal force under orthodontic tooth movement according to the histologic and biomecanical methods in the periodontal tissue. The results obtained were :
1.Regeneration of the remaining degenerated tissue and bone under initial orthodontic force was delayd incident to readjusted orthodontic force. And this region was the center of rotation following readjusted force. The remaining degenerated tissue and bone reduced in size with time, but remained after the readjusted period. It is suggested that a reduction in force or bodily movement may be desirable to avoid tipping movement.
2.The rear bone resorptions was observed widely at the site of the alveolar bone behind the degenerated tissue. These resorptions occurred in the perforating channels near the periodontal space. A part of the degenerated tissue passing to the large orifices of the channels was also observed. Many blood vessels and osteoclasts were located near the degenerated tissue.
3.There is a close relationship between the morphology and distribution of blood vessels with the distribution of pressure in perforating channels.
4.The specimen-specific finite element analysis showed that the degenerated tissue was formed around the peak of the compressive stress distribution. The minimum value of the peak was estimated to be more than -35kPa.

Report

(3 results)
  • 1997 Annual Research Report   Final Research Report Summary
  • 1996 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 入江 丈元: "歯に再荷重を加えた際の圧迫側歯周組織の変化" 北海道歯学雑誌. 17・2. 299-311 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 本村 英禾: "圧迫側歯根膜に生じる変性組織と応力分布との関連" 北海道歯学雑誌. 17・2. 312-324 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 日下部 豊寿: "実験的歯の移動時における圧迫側歯槽骨に生じる背部骨吸収と血管分布" 歯科基礎医学雑誌. 39-6. 623-640 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Jogen Irie: "Changes in periodontal tissue on the pressure side incident to readjusted orthodontic force." Hokkaido Journal of Dental Science. 17-2. 299-311 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Eiji Honmura: "The relationship between degenerated tissue and stress distribution of periodontal ligament on the pressure side." Hokkaido Journal of Dental Science. 17-2. 312-324 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] Toyohisa Kusakabe: "Rear resorption at the pressure side incident in orthodontic tooth movement." Japanese Journal of Oral Biology. 39-6. 623-640 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1997 Final Research Report Summary
  • [Publications] 日下部 豊寿: "実験的歯の移動時における圧迫側歯槽骨に生じる背部骨吸収と血管分布" 歯科基礎医学会雑誌. 39・6. 623-640 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1996-04-01   Modified: 2016-04-21  

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