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Bruxism as a causative factor of craniomandibular disorders

Research Project

Project/Area Number 03044176
Research Category

Grant-in-Aid for Overseas Scientific Survey.

Allocation TypeSingle-year Grants
Research InstitutionTokushima University

Principal Investigator

BANDO Eiichi  Tokushima University School of Dentistry, Professor, 歯学部, 教授 (00014168)

Co-Investigator(Kenkyū-buntansha) ヒューレット エドモンド  カリフォルニア大学, ロサンゼルス校・歯学部, 講師
クラーク グレン・トーマ  カリフォルニア大学, ロサンゼルス校・歯学部, 教授
NISHIGAWA Keisuke  Tokushima University, University Dental Hospital, Research Associate, 歯学部附属病院, 助手 (10202235)
IKEDA Takashi  Tokushima University, School of Dentistry, Research Associate, 歯学部, 助手 (30193204)
KONDO Kazuo  Tokushima University, School of Dentistry, Research Associate, 歯学部, 助手 (00195893)
NAKANO Masanori  Tokushima University, School of Dentistry, Associate Professor, 歯学部, 助教授 (30136262)
HEWLETT Edomond R.  The University of California Los Angeles, School of Dentistry, Assistant Profess
CLARK Glenn T.  The University of California Los Angeles, School of Dentistry, Professor
Project Period (FY) 1991
Project Status Completed (Fiscal Year 1991)
KeywordsBruxism / EMG / ECG / Electrical Stimulation / Criteria for a bruxing event
Research Abstract

The purpose of this project was to establish a highly reliable and reproducible criteria for a bruxing event using masseter EMG activity together with ECG and respiration responses. Masseter was analyzed by converting the raw EMG signal to an RMS signal and the amplitude of this signal was quantified in terms of the subject's 100% maximum voluntary contraction (MVC).
1. A bruxing event was defined by an increase in EMG above baseline and at least 3% of maximum voluntary contraction level. Using this criteria, a mean duration of the RMS converted EMG above the event criteria was 14.3<plus-minus>13.9 seconds and the mean amplitude was 19.2<plus-minus>31.2% of
2. Mean heart rate was shown to be 72.8<plus-minus>12.5 pulses/minute during bruxing events. The mean heart rate during a bruxing event was found to be increased by 18.0<plus-minus>9.2% when compared to the mean heart rate for the period 5 seconds immediately before this ev
The effect of contingent afferent electrical stimulation to the lip was evaluated for sleep associated bruxism. This study used a 4 channel analog tape system to record masseter EMG, ECG, respiration and tooth contact triggered events during sleep in the subject's home for 5 nights.
1. A substantial reduction of total masseter EMG activity was observed in 3 of 5 patients tested, across the 5 night of contingent electrical lip stimulation. There was no remarkable change in the mean duration of each bruxing event.
2. No subject reported awaking during the night because of the lip stimulation.
3. These data, suggest the method may be useful as a therapeutic intervention for more severe bruxers.

Report

(1 results)
  • 1991 Final Research Report Summary
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] K.Kondo and G.T.ClarK: "A method for detecting a bruxing event" Journal of Dental Research. 70. 512 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T.Ikeda,M.Nakano and E.Bando: "The effect of traumatic occlusal contact on tooth pain threshold" Journal of Dental Research. 70. 330 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K.Nishigawa,M.Nakano,E.Bando and G.T.Clark: "The relationship between lateral border movements of the mandible and the determinants of occlusion" The Journal of Prosthetic Dentistry. 66. 486-492 (1991)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Kondo and G. T. Clark: "A method for detecting a bruxing event" Journal of Dental Research. 70. 512 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] T. Ikeda, M. Nakano and E. Bando: "The effect of traumatic occlusal contact on tooth pain threshold" Journal of Dental Research. 70. 330 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] K. Nishigawa, M. Nakano, E. Bando and G. T. Clark: "The relationship between lateral border movements of the mandible and the determinants of occlusion" The Journal of Prosthetic Dentistry. 66. 486-492 (1991)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary

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Published: 1993-03-16   Modified: 2016-04-21  

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