| Project/Area Number |
62480413
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
小児・社会系歯学
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| Research Institution | Tokyo Medical and Dental University |
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Principal Investigator |
MIURA Fujio Tokyo Medical and Dental University, School of Dentistry, 歯学部, 教授 (90013789)
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| Co-Investigator(Kenkyū-buntansha) |
HANDA Hideho Tokyo Medical and Dental University, School of Dentistry, ASSISTANT (90143601)
MOGI Masakuni Tokyo Medical and Dental University, School of Dentistry, School of Dentistry, LECTURER (30134729)
KURIHARA Saburou Tokyo Medical and Dental University, School of Dentistry, LECTURE (70126225)
SOMA Kunimiti Tokyo Medical and Dental University, School of Dentistry, ASSISTANT (10014200)
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| Project Period (FY) |
1987 – 1989
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥5,700,000 (Direct Cost: ¥5,700,000)
Fiscal Year 1988: ¥1,500,000 (Direct Cost: ¥1,500,000)
Fiscal Year 1987: ¥4,200,000 (Direct Cost: ¥4,200,000)
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| Keywords | Orthodontic treatment / Tooth movement / Nickel-Titanium alloy wire / 超弾性 / 矯正力 / ニッケル / チタン合金線 / 三次元有限要素法 / 歯根膜感覚単位 |
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| Research Abstract |
Each item of this research project was performed. Results was concluded as follows:
1> Study of material By heat treatment, changing the force level with a single wire can be done. Arch wires and coil springs were fabiecated by this wire for histological or physiological studies. By DERHT method <electric current is passed directly through wire itself>, bending and arch coordination can be done. About the arch which was investigated by bio-dynamic study, the way of arch coordination was originated by furnace hear treatment. Thus wire control in details can be done, which was very difficult in chair-side direct way.
2> Study of bio-dynamics The shape of the arch wire in orthodontic use may be based on that of normal occlusion. Stress distribution was investigated by three dimensional finite about the arch and mandible. The result was useful for design of orthodontic arch wire.
3> Study of neuro-physiology Response properties of single sensory units innervating human periodontal ligament and oral mucosa to super-elastic force were investigated. the impulse frequency of these units related to the detection of the stimulus magnitude and velocity.
4> study of histology Teeth movements of dogs(in vivo) were investigated and histological change were observed. The remodeling of periodontal tissue was active and normal, and the damage to body was little.
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