2002 Fiscal Year Final Research Report Summary
Study on Optical Properties of Human Tooth and Restorative Materials
| Project/Area Number |
12671895
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
補綴理工系歯学
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| Research Institution | Kagoshima University |
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Principal Investigator |
ARIKAWA Hiroyuki Kagoshima University, Graduate School of Medical and Dental Sciences, Research Associate, 大学院・医歯学総合研究科, 助手 (90128405)
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| Co-Investigator(Kenkyū-buntansha) |
TSUKADA Gakuji Kagoshima University, Graduate School of Medical and Dental Sciences, Research Associate, 大学院・医歯学総合研究科, 助手 (70236850)
KADOKAWA Akihiko Kagoshima University, Graduate School of Medical and Dental Sciences, Research Associate, 大学院・医歯学総合研究科, 助手 (00169533)
FUJII Koichi Kagoshima University, Graduate School of Medical and Dental Sciences, Associate Professor, 大学院・医歯学総合研究科, 助教授 (60156817)
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| Project Period (FY) |
2000 – 2003
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| Keywords | Optical properties / Light transmittance / Distribution spectra / Diffusion characteristics / Enamel / Dentin / Composite resin / Crown and bridge resin |
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| Research Abstract |
In this study, we examined the light transmittance characteristics, include wavelength distribution and diffusion characteristics, for human enamel, dentin and restorative materials such as composite resins, crown and bridge resins, and paint-on resins for shade modification, and evaluated the effect of light transmittance characteristic on color appearance of the materials.
The values of overall transmission coefficient of enamel ranged from 0.37 to 0.43 in overall wavelength (400-700 nm). The values were higher than those of composite restorative resins, and almost equal to those of crown and bridge resins, and paint-on resins for shade modification. The crown and bridge resins, and paint-on resins also showed similar light transmittance distribution spectra and diffusion characteristics to enamel. It is desirable for the materials to match color appearance between natural tooth and materials. The results indicate that the light transmittance characteristics play an important role for the color of restorative resins. The significant difference in light transmittance characteristic among materials and shades will affect their clinical appearance.
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