| Project/Area Number |
05671651
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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 |
補綴理工系歯学
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| Research Institution | Fukuoka Dental College |
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Principal Investigator |
FUKUSHUMA Tadao Fukuoka Dental College, Associate professor, 歯学部, 助教授 (80084250)
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| Co-Investigator(Kenkyū-buntansha) |
KAWAGUCHI Minoru Fukuoka Dental College, Research associate, 歯学部, 助手 (10122780)
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| Project Period (FY) |
1993 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,100,000 (Direct Cost: ¥2,100,000)
Fiscal Year 1995: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1994: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1993: ¥1,100,000 (Direct Cost: ¥1,100,000)
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| Keywords | Dentinprimer / Bond strength / Dentin / Etchingagent / Composite resin |
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| Research Abstract |
The dentin primers containing N-hydroalkylacrylamide (N-HA) monomers { (N-methlolacryamide (MEAA), N-methylolmethacrylamide (MEMA), N- (2-hydroxyethyl) acrylamide (EAA), N- (2-hydroxyethyl) methacrylamide (EMA), N- (2,3-dihydroxypropyl) acrylamide (DAA), N- (2,3-dihydroxypropyl) methacrylamide (DMA) } were prepared in order to improve the bond strength of composite resin to etched dentin. The bond strength of composite resins with dentin primers to dentin etched with 10% citric acid-3% ferric chloride and EDTA solutions, and 10% maleic acid and 10% phosphoric acid gels was measured after 1-day, 1-year and 2-year immersion in 37ﾟC water or after thermal stress (4ﾟC*60ﾟC,20 * 10^3 and 50 * 10^3 cycles). The relationship between the chemical structures of N-HA monomers and dentin primer treatment capability was investigated. The dentin primers containing about 50% N-HA monomers showed better dentin primer treatment capability and improved the bond strength. N-HA monomers with acrylic group and short methylene chains showed better dentin primer treatment capability than the others, including HEMA and Glycery methacrylate. The highest bond strengths after 1-year and 2-year immersion in water and thermal stress were obtained with 50% MEAA followed by 30% MEMA and 35% HEMA dentin primers.
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