| Project/Area Number |
05671640
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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 | Kanagawa Dental College |
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Principal Investigator |
UMEMOTO Kozo Kanagawa Dental College, Department of Dental Materials, Associate professor, 歯学部, 助教授 (40097275)
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| Co-Investigator(Kenkyū-buntansha) |
KURATA Shigeaki Kanagawa Dental College, Department of Chemistry, Lecturer, 歯学部, 講師 (20104333)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1994: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1993: ¥1,600,000 (Direct Cost: ¥1,600,000)
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| Keywords | Ionomer cement / Mechanical property / Water resistance / Temperature-response polymer / 耐水耐久性 |
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| Research Abstract |
To diminish the effect of water on the mechanical property- and the adhesion-durability of glass ionomer cement, an experimental cement using temperature-response polymer as the cement liquid was studied. Temperature-response polymers were synthesized by radical polymerization of a variety ratio of N-isopropylacrylamid (NIPAM) and acrylic acid (AA). The cement powder consisted of a fluorin containing aluminosilicate glass. The temperature of phase separation of AA-NIPAM copolymer decreased with an increasing amount of AA in the range of 0 to 40 mol% in the copolymer, and increased with an increasing amount of AA in the range of 40 to 70 mol%. The bond strengths of the cement prepared from the AA-NIPAM copolymer containing 70 mol% AA superior to that of the cement prepared from poly (acrylic acid) (PAA) as ordinary cement liquid. The compressive strength of the AA-NIPAM cement dcreased slightly compared with that of PAA cement, but the bond strength increased with an increasing amount of AA.
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