Surface damages of zirconia by Nd:YAG dental laser irradiation
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概要
- 論文の詳細を見る
The purpose of this study was to characterize the surface damages of zirconia by Nd:YAG dental laser irradiation through a systematic evaluation of the associated microstructural changes. Disk specimens of yttria-stabilized tetragonal zirconia polycrystals (Y-TZP) and ceria-stabilized zirconia/alumina nanocomposite (Ce-TZP/Al2O3 nanocomposite) were irradiated by Nd:YAG dental laser. The specimens were characterized using scanning electron microscopy, X-ray diffractometry, and wavelength dispersive X-ray spectroscopy. Every single irradiated spot was indicated by a circular black pit surrounded by a circular raised rim with a sunken depression at the center. On surface changes, many cracks were formed inside each irradiated pit. On changes in elemental composition, the concentration of oxygen decreased while that of zirconium increased. After heating in air, the assembly of circular black pits turned white, although the depression and raised rim remained. This study showed that Nd:YAG dental laser irradiation induced cracking and reduced oxygen content on the surface of zirconia. Consequently, these phenomena reduced the mechanical strength of zirconia. Therefore, Nd:YAG dental laser welding should not be performed on tetragonal zirconia.
- 日本歯科理工学会の論文
- 2010-09-01
著者
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BAN Seiji
Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima Univer
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Noda Makoto
Department Of Cardiology Social Insurance Central General Hospital
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Ban Seiji
Kagoshima Univ. Kagoshima Jpn
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Ban S
Department Of Biomaterials Science Graduate School Of Medical And Dental Sciences Kagoshima Universi
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Ban Seiji
Department Of Biomaterials Science Graduate School Of Medical And Dental Sciences Kagoshima Universi
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MINESAKI Yoshito
Department of Fixed Prosthetic Dentistry, Advanced Therapeutic Course, Kagoshima University Graduate
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Ban Seiji
Department Of Biomaterials Science Kagoshima University Graduate School Of Medical And Dental Scienc
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Noda Makoto
Department Of Biomaterials Science Graduate School Of Medical And Dental Sciences Kagoshima Universi
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OKUDA Yuji
Departments of Radiology, Miyazaki Medical College
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Okuda Yuji
Department Of Biomaterials Science Graduate School Of Medical And Dental Sciences Kagoshima Universi
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TSURUKI Jiro
Department of Biomaterials Science, Graduate School of Medical and Dental Sciences, Kagoshima Univer
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TAKENOUCHI Yasumi
A-Dental Lab
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Tsuruki Jiro
Department Of Biomaterials Science Graduate School Of Medical And Dental Sciences Kagoshima Universi
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Minesaki Yoshito
Department Of Fixed Prosthetic Dentistry Graduate School Of Medical And Dental Sciences Kagoshima Un
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Minesaki Yoshito
Department Of Fixed Prosthetic Dentistry Graduate School Of Medical And Dental Sciences Kagoshima Un
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Ban Seiji
Department Of Biomaterials Science Field Of Oral And Maxillofacial Rehabilitation Course For Advance
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