| Project/Area Number |
09470433
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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 |
補綴理工系歯学
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| Research Institution | Tokyo Medical and Dental University |
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Principal Investigator |
TAKAHASHI Hidekazu Tokyo Medical and Dental University Department of Dental Technology I Associate Professor, 歯学部, 助教授 (90175430)
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| Co-Investigator(Kenkyū-buntansha) |
NAKAMURA Hideo Tokyo Medical and Dental University Department of Dental Technology I Research A, 歯学部, 助手 (60172425)
NISHIKAWA Izuru Osaka University, Division of Mechanical Science Associate Professor, 大学院・基礎工学研究科, 助教授 (90189267)
NISHIMURA Fumio Tokyo Medical and Dental University Department of Dental Technology I Professor, 歯学部, 教授 (10013856)
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| Project Period (FY) |
1997 – 1998
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| Project Status |
Completed (Fiscal Year 1998)
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| Budget Amount *help |
¥9,400,000 (Direct Cost: ¥9,400,000)
Fiscal Year 1998: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 1997: ¥7,800,000 (Direct Cost: ¥7,800,000)
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| Keywords | Dentin / Tensile test / Tensile strength / Elastic modulus / Aging / Fatigue / Laser speckle pattern / 歯質 / レーザスペックル / 根管治療薬 / サーコルサイクル |
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| Research Abstract |
In this research, we tried to evaluated effects of aging on deformation behavior of dentin in small area. A laser speckle strain measurement was examined for possibility of dentin specimen application ; this method was considered to be suitable for strain measurement of small dentin specimen. Simulation procedure of aging effect on dentin were evaluated after immersion into intercanal medicaments and storage in 5ﾟC or 55ﾟC water and thermocycling test. Dentin tensile strength after a certain intercanal medicament significantly increased, however immersion into-intercanal medicaments was not similar effects of aging on dentin properties. Water storage for two week between 5ﾟC and 55ﾟC did not significantly effect on dentin tensile strength ; however obtained Weibull modulus after two week thermocycling had a tendency to decreased ; therefore longer water immersion might be similar effect of aging on dentin. Further investigation is necessary to clarify the aging mechanism of dentin.
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