| Project/Area Number |
14571838
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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 |
補綴理工系歯学
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| Research Institution | Tokyo Medical and Dental University |
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Principal Investigator |
MORIZAWA Masayuki Tokyo Medical and Dental University, Faculty of Dentistry, Assistant, 大学院・医歯学総合研究科, 助手 (40191019)
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| Co-Investigator(Kenkyū-buntansha) |
HAYAKAWA Iwao Tokyo Medical and Dental University, Faculty of Dentistry, Professor, 大学院・医歯学総合研究科, 教授 (60014172)
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| Project Period (FY) |
2002 – 2004
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| Project Status |
Completed (Fiscal Year 2004)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2004: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2003: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2002: ¥2,100,000 (Direct Cost: ¥2,100,000)
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| Keywords | Denture / Masticatory Ability / Soft Lining Material / Viscoelastic properties / Water sorption / Solubility / 吸収性 / 溶解性 |
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| Research Abstract |
The cyclic loadings during mastication supposedly accelerate degradation of soft lining materials. The purpose of this study was to investigate the effects of the cyclic loadings on viscoelastic properties of soft lining materials. Two plasticized acrylics, two silicones and one isoprene-based monomer contained elastomer were selected. Cylindrical-shaped specimens, 10 mm X 10 mm Φ, were prepared. Twenty specimens were subjected to cyclic loading in a water bath at 37 ℃ ; other twenty specimens were without cyclic loading. The viscoelastic properties were measured by a creep-meter. The cyclic loading significantly decreased heights of two materials, the instantaneous elastic displacements of one acrylic liner and the viscous flows of three materials. The cyclic loading affected mainly delayed deformations. Therefore, the cyclic loading was useful evaluating method for durability of soft lining material.
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