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Assessment of visco-elasticity of the periodontium by means of simultaneous recording fo tooth oscillation and peripheral circulation

Research Project

Project/Area Number 06672061
Research Category

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

Allocation TypeSingle-year Grants
Research Field 矯正・小児・社会系歯学
Research InstitutionKyushu University

Principal Investigator

AKIYAMA Youichi  Kyushu Univ.Fac.of Dent., Research Associate, 歯学部, 助手 (50037537)

Co-Investigator(Kenkyū-buntansha) NAKATA Shunsuke  Kyushu univ.Ffac.of Dent., Associate Prof., 歯学部, 助教授 (30037543)
Project Period (FY) 1994 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1994: ¥1,600,000 (Direct Cost: ¥1,600,000)
KeywordsTooth oscillation / Amorphous core multivibrator sensor / Blood flow in periodontal membrane / visco-elasticity of the periodontium / アモルファスセンサ
Research Abstract

The tooth pulsates due to blood flow through capillary vessels of the periodontal membrane. The purpose of the present research was to obtain an index for assessment of the peripheral circulation and visco-elasticity of the periodontium through the measurement of tooth oscillation with an Amorphous core multivibrator senser.
First, to obtain the norm of tooth oscillation of the unaffected periodontium, the recordings of 23 central incisors with healthy periodontal membrane were analyzed. (1) The mean amplitude of the labio-lingual derection (0.59mum) and the variations were smaller than the tooth axis deirection (0.88mum) . (2) The tooth pulsated as late as 0.11-0.13 sec after R-wave of electrocardiograph. (3) The three measurement points at the labial surface moved in a similar direction in 16 teeth, and showed different trends in the others. (4) Two patterns of the power spectrum were observed. One in which the power of the spectrum decreased gradually with increased frequency, the other was that the depression is seen at the midst of the spectrum.
Second, the possibility of the index of the optimum force were estimated from the measurement of tooth oscillation at the beginning of the tooth movement, a month after the first premolar, the upper left canine were pushed by the orthodontic force of about 0,20,60 and 120 grams. At resting condition of 0 gram, the pulsation synchronized with the heart rate in which the amplitude was 0.15 mum. The amplitude at the force of 20 grams increased slightly. This suggested that the blood flow was still secured under the pressed periodontal membrane. At the force of 60 and 120 grams, the amplitudes were almost 0.1 and under 0.05 mum, respectively. This decreased amplitude indicated that the blood flow in the periodontal membrane was impeded as the force imcreased.

Report

(3 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • Research Products

    (11 results)

All Other

All Publications (11 results)

  • [Publications] 五百井秀樹: "歯の脈動の定量的評価-I.計測システムについて-" 日本矯正歯科学会雑誌. 50. 441-447 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 名方俊介: "歯の脈動の定量的評価-II.正常な歯周組織を有する上顎前歯の脈動の様相-" 日本矯正歯科学会雑誌. 51. 286-291 (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 森下 格: "矯正力の大きさと歯根膜血流由来の歯の微小振動との関係" 第54回日本矯正歯科学会大会抄録集. 161 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Ioi, H: "A quantitative evaluation of periodontal pulsation-I.On the measuring system-" J.Jpn Orthod.Soc. 50 (6). 441-447 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Nakata, S.: "A quantitative evaluation of periodontal pulsation -II.The phases of periodantal pulsation of the upper incisor without the periodontal disease-" J.Jpn Orthod.Soc. 51 (4). 286-291 (1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Morishita, T.: "The effect of orthodontic force on periodontal pulsation" The 54th annual meeting of Jpn Orthod. Soc. (abstract). 161 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 五百井秀樹: "歯の脈動の定量的評価 -I.計測システムについて-" 日本矯正歯科学会雑誌. 50. 441-447 (1991)

    • Related Report
      1995 Annual Research Report
  • [Publications] 名方俊介: "歯の脈動の定量的評価 -II.正常な歯周組織を有する上顎前歯の脈動の様相-" 日本矯正歯科学会雑誌. 51. 286-291 (1992)

    • Related Report
      1995 Annual Research Report
  • [Publications] 森下 格: "矯正力の大きさと歯根膜血流由来の歯の微小振動との関係" 第54回日本矯正歯科学会大会抄録集. 161- (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 五百井秀樹: "歯の脈動の定量的評価-I.計測システムについて-" 日本矯正歯科学会雑誌. 50. 441-447 (1991)

    • Related Report
      1994 Annual Research Report
  • [Publications] 名方俊介: "歯の脈動の定量的評価-II.正常な歯周組織を有する上顎前歯の脈動の様相-" 日本矯正歯科学会雑誌. 51. 286-291 (1992)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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