| Project/Area Number |
22592127
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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 |
Conservative dentistry
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| Research Institution | Nihon University |
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Principal Investigator |
IKEMI Takuji 日本大学, 松戸歯学部, 教授 (80102565)
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| Research Collaborator |
NEMOTO Shogo 日本大学, 大学院・松戸歯学研究科保存修復学専攻, 大学院生
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2012: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2010: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
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| Keywords | 歯学 / 高性能レーザー / 応用工学 / 量子光工学 / 自由電子レーザー / Er：YAGレーザー / 高速度カメラ / 蒸散深さ / 被照射体の昇温 / ウシ象牙質 / パルス幅 / Er:YAGレーザー / 蒸散の様相 / 削除片 / SEM観察 / 昇温 / 歯科用レーザー / エルビウムヤグレーザー / 波長 / 繰り返しパルス数 |
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| Research Abstract |
The present study focused on the effect of ultrashort pulses emitted by a FEL, and a high-speed camera was used to observe the aspects of bovine dentin transpiration using the FEL tuned to the same wavelength as Er:YAG laser (2.94μm). The ejected transpiration particles were also observed by a scanning electron microscope (SEM) and the depth of transpiration was compared with that obtained by an Er:YAG laser. Additionally, irradiation was performed on bovine dentin with varying FEL irradiation wavelengths of 2.50, 2.94, 3.50, and 4.00μm, the depth of transpiration was measured, and increases in temperature at the irradiated site (irradiated side) and the opposite side of the sample directly under the irradiated site (dental pulp side) were also measured by a radiation thermometer. The results showed that dentin could be ablated effectively by using a laset, having a pulse width shorter than the thermal relaxation time and an approximate wavelength of 2.94μm.
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