| Project/Area Number |
09470429
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Conservative dentistry
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| Research Institution | TSURUMI UNIVERSITY |
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Principal Investigator |
MOMOI Yasuko Tsurumi Univ. Operative Dent. Lecturer, 歯学部, 講師 (10103558)
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| Co-Investigator(Kenkyū-buntansha) |
FUJIBAYASHI Kuniko Tsurumi Univ. Operative Dent. A/Professor, 歯学部, 助手 (70196806)
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| Project Period (FY) |
1997 – 1999
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| Project Status |
Completed (Fiscal Year 1999)
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| Budget Amount *help |
¥7,300,000 (Direct Cost: ¥7,300,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 1997: ¥5,800,000 (Direct Cost: ¥5,800,000)
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| Keywords | Dentin / acid-etching / decalcity / Re-meneralization / adhesive resin / nano-hardness / hybrid layer / Surface roughness / 接着性 コンポジットレジン |
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| Research Abstract |
Most part of this research project was achieved by evaluating nano-hardness of restoratives-tooth interface. The work was done using a nano-hardness tester (ENT-1100, Elionix, Tokyo, Japan) which we purchased with the support of the grant-in-aid for scientific research. To investigate whether the decalcified dentin (prepared in the intact dentin) or the caries affected dentin (use human natural carious teeth), could be penetrated completely by the dentin bonding agents, we evaluated the nano-hardness across the restoratives-dentin bonded area of human dentin after the restoration. We tested the adhesive resin restorations of two categories, wet bonding and self-etching systems. Results have demonstrated that the nano-hardness of decalcified dentin increased after the dentin was restored using adhesive resin systems, while the nano-hardness of caries affected dentin could not resume to the hardness value of normal dentin. It is concluded that the nano-indentation system developed in this project permitted a greater qualitative discrimination of characteristic change of resin-dentin bonded area than does SEM alone.
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