Contamination of dental zirconia before final firing: Effects on mechanical properties
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概要
- 論文の詳細を見る
Plate-like specimens were prepared, using a diamond saw, from Cercon —a pre-sintered yttria-stabilized tetragonal zirconia polycrystal (Y-TZP) block. These specimens were treated with 10 kinds of dental materials which acted as contaminants, and then sintered at 1,350°C or 1,450°C. After the final firing, specimens were subjected to a three-point flexural test and Vickers hardness test. Their surfaces were also characterized by scanning electron microscopy and X-ray diffractometry. Phosphorus-containing contaminants reduced the three-point flexural strength and hardness of final sintered zirconia due to the formation of YPO4 and phase transformation from tetragonal to monoclinic zirconia. Gypsum also reduced both mechanical properties due to the formation of CaZrO3 and phase transformation from tetragonal to cubic zirconia. Other contaminants showed no adverse effects on the mechanical properties of final sintered zirconia.
- 日本歯科理工学会の論文
著者
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Kawai Tatsushi
Department Dental Materials Science School Of Dentistry Aichi-gakuin University
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Ban Seiji
Department Of Biomaterials Science Field Of Oral And Maxillofacial Rehabilitation Course For Advance
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BAN Seiji
Department of Dental Materials Science, School of Dentistry, Aichi Gakuin University
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TSURUKI Jiro
Graduate School of Medical and Dental Sciences, Kagoshima University
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OKUDA Yuji
Center for Advanced Oral Science, School of Dentistry, Aichi Gakuin University
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NODA Makoto
Universal Implant Research Institute
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KONO Hiroshi
Graduate School of Medical and Dental Sciences, Kagoshima University
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