| Project/Area Number |
22592183
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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 |
Dental engineering/Regenerative dentistry
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| Research Institution | Okayama University |
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Principal Investigator |
IRIE Masao 岡山大学, 医歯(薬)学総合研究科, 助教 (90105594)
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| Co-Investigator(Kenkyū-buntansha) |
TANAKA Jiro 岡山大学, 大学院医歯薬学総合研究科, 助教 (40171764)
NISHIGAWA Goro 岡山大学, 岡山大学病院, 講師 (00172635)
MARUO Yukinori 岡山大学, 岡山大学病院, 講師 (60314697)
TAMADA Yoshiyuki 岡山大学, 岡山大学病院, 医員 (90509499)
SAITOU Takashi 北海道医療大学, 歯学部, 教授 (40265070)
鈴木 一臣 岡山大学, 大学院・医歯薬学総合研究科, 教授 (30050058)
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| Project Period (FY) |
2010-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2012: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2011: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2010: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
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| Keywords | 球状シリカ / BMP / 象牙質 / 再生 / グラスアイオノマーセメント / in vivo / 多機能型ウ蝕治療材料 |
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| Research Abstract |
To clarify the effects of addition of silanized (S) and unsilanized (U) spherical silica filler to resin-modified glass ionomer cement(RMGIC) and of powder-liquid ratio on 1) the early marginal gap-width of restorations in both tooth cavities and Teflon molds, 2) the gap-formation of restorations in Class V cavities, and 3) the compressive strength of the cement. RMGIC powder was modified by adding 5 and 10 wt.% of powder respectively, of S and U, and then the powder-liquid ratio was increased up to 4.8. Marginal gap and cavity adaptation of the restorations improved with increasing powder-liquid ratio (3.0 to 4.4-4.8) and compressive strength increased (111 to 150-170 MPa, p<0.05). Highly significant correlation coefficients were found for the relationships between powder-liquid ratio and 1) percentage of marginal gap width in the tooth cavity, 2) gap-free tooth/cement interfaces, 3) percentage of marginal gap widths in the Teflon mold and 4) compressive strengths of the cements.
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