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Study of gamma motoneuron activities of masticatry muscle in craniofacial asymmetry cases.

Research Project

Project/Area Number 08457567
Research Category

Grant-in-Aid for Scientific Research (B)

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

Principal Investigator

HANADA Kooji  Niigata Univ.Dent. : Professor, 歯学部, 教授 (90013979)

Co-Investigator(Kenkyū-buntansha) HOSHI Takao  Niigata Univ.Dent.Hosp. : Assistant professor, 歯学部附属病院, 助手 (10272832)
SEKI Yasuhiro  Niigata Univ.Dent. : Assistant professor, 歯学部, 助手 (20251837)
Project Period (FY) 1996 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥7,800,000 (Direct Cost: ¥7,800,000)
Fiscal Year 1998: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1997: ¥300,000 (Direct Cost: ¥300,000)
Fiscal Year 1996: ¥7,000,000 (Direct Cost: ¥7,000,000)
Keywordscraniofacial asymmetry / TVR / gamma motonueron / 顎変形症 / 咀嚼筋誘発筋電図 / 咬合接触状態
Research Abstract

The purpose of this study was to investigate the relationship between facial morphology and gamma motoneuron activities of masticatory muscle in craniofacial asymmetry cases.
In this study, we evaluated muscle activities of masseter and temporal muscle which were induced by tonic vibration in craniofacial asymmetry cases and healthy volunteer subjects, and the following results were obtained :
Regarding relationship between mandibular deviation and muscle activities of temporal muscle :
1. TVR index had a tendency to be lower on mandiblar deviation side than on the other side in all subjects, and difference of both sides TVR index had signifcantly negative correlation with that in madibular deviation.
2. TVR index became bigger when mandible was moved laterally to the opposite direction to the evaluated side, and TVR index was the lowest at the mandibular position in the path of closure where the distance between the upper and lower incisors was 11 mm.
Regarding relationship between mandibular deviation and muscle activities of masseter muscle :
1. TVR index had a tendency to be lower in the mandibular deviation side than in the other side in craniofacial aymmetry cases.
2. Difference of both sides TVR index had signifcantly negative correlation with that in madibular deviation.
These results suggested that madibular deviation could have influences on difference of both sides in the gamma motoneuron activities in cases with craniofacial asymmetry

Report

(4 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • 1996 Annual Research Report
  • Research Products

    (1 results)

All Other

All Publications (1 results)

  • [Publications] 山田一尋 他5名: "顎関節症を伴う不正咬合患者の側面顎顔面形態と咬合力の関連に関する研究" 日本顎口腔機能学会雑誌. 4巻. 59-65 (1997)

    • Related Report
      1997 Annual Research Report

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

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