1993 Fiscal Year Final Research Report Summary
Bleaching of discolored teeth with high frequwmy current
| Project/Area Number |
04671168
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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 |
Conservative dentistry
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| Research Institution | SHOWA UNIVERSITY |
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Principal Investigator |
HISAMITSU Hisashi Showa U, Orthodont. prof, 歯学部, 教授 (30092430)
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| Co-Investigator(Kenkyū-buntansha) |
KOBAYASHI Noriko Showa U, Orthodont. Assistant, 歯学部, 助手 (10245805)
MATSUBA Hiroshi Showa U, Orthodont. Assistant, 歯学部, 助手 (90241025)
SUZUKI Toshimitsu Showa U, Orthodont. A.prof, 歯学部, 助教授 (80154558)
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| Project Period (FY) |
1992 – 1993
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| Keywords | discolored teeth / teeth bleaching / high requency current / hydrogen peroxide |
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| Research Abstract |
From the results of the colre analyqer test, it was obvious that color of the surfoce brightened and the yellowish color was slightly gone after bleaching. The etching procedure decreased L* and b*.
However, the bleaching theatment resulted in a gradual incrase of L* and decrease of b*. The etching procedure rainforced the efficaay of bleaching. To compaire the four bleaching agents in dE, there was a signigificant difference only vetween H_2O_2 and Hi-Lite in the no-etching group.
From the SEM observation, the micro struct* of the enamel prisms were destroyed by the bkeaching procedune.The morphalogical chage of the enamel aurface by high frequwncy current was obserued.
This new etching-bleaching method for discolored teeth using high frequency current was found to be effectiue and clinically safe.
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Research Products
(2 results)
