| Project/Area Number |
03650034
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
物理計測・光学
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| Research Institution | The University of Tokushima |
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Principal Investigator |
ARAKI Tsutomu Univ.Tokushima,Technical College,Professor, 工業短期大学部, 教授 (50136214)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAMOTO Akira Univ.Tokushima,Sch.Medicine,Assist.Prof., 医学部, 助手 (90191387)
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| Project Period (FY) |
1991 – 1992
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| Project Status |
Completed (Fiscal Year 1992)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1992: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1991: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | microfluorometry / human tooth / time-resolved spectroscopy / pulse lamp / fluorescence / artificial tooth |
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| Research Abstract |
Human teeth fluoresces as a result of illumination by UV-light.The fluorescence characteristics of human teeth were investigated with respect to aging and caries by microscope fluorometry.To measure nanosecond decay features of tooth fluorescence,a microscope fluorometer equipped with an air-discharge pulsed lamp and a Xe pulsed lamp was devised.A fiberscope fluorometer was also devised to apply the time-resolved fluorometry into clinical inspection of human teeth.The fluorescence intensity and fluorescence decay curve were found to be age dependent in dentine tissue.The fluorescence intensity and fluorescence decay curve of caries enamel were similar to those of hydroxyapatite than the sound enamel.The data suggest that both quantitative and qualitative changes in the organic matrix of tooth tissue may affect its fluorescence characteristics.
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