Characteristics of glass ionomer cements composed of glass powders in CaO–SrO–ZnO–SiO2 system prepared by two different synthetic routes

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• 作者：Ill Yong Kim (1) (2)
  Chikara Ohtsuki (1)
  Aisling Coughlan (2)
  Lana Placek (2)
  Anthony W. Wren (2)
  Mark R. Towler (3) (4)
  
• 刊名：Journal of Materials Science Materials in Medicine
• 出版年：2013
• 出版时间：December 2013
• 年：2013
• 卷：24
• 期：12
• 页码：2677-2682
• 全文大小：
• 作者单位：Ill Yong Kim (1) (2)
  Chikara Ohtsuki (1)
  Aisling Coughlan (2)
  Lana Placek (2)
  Anthony W. Wren (2)
  Mark R. Towler (3) (4)
  
  1. Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya, 464-8603, Japan
  2. Inamori School of Engineering, Alfred University, Alfred, NY, USA
  3. School of Biomedical Engineering, University of Malaya, Kuala Lumpur, Malaysia
  4. Department of Mechanical and Industrial Engineering, Ryerson University, Toronto, ON, Canada
  
• ISSN：1573-4838

文摘

Glass ionomer cements (GICs) are composed of an acid degradable glass, polyacrylic acid and water. Sol–gel processing to prepare the glass phase has certain advantages, such as the ability to employ lower synthesis temperatures than melt quenching and glasses that are reported to have higher purity. A previous study reported the effects of glass synthesis route on GIC fabrication. However, in that study, the sol–gel derived glass exhibited a reduced concentration of cations. This study investigates increasing the cation content of a sol–gel derived glass, 12CaO·4SrO·36ZnO·48SiO2 (molar ratio) by heating before aging to reduce dissolution of cations. This glass was prepared by both sol–gel and melt-quenched routes. GICs were subsequently prepared using both glasses. The resultant cement based on the sol–gel derived glass had a shorter working time than the cement based on the melt-quenched one. Contrary to this, setting time was considerably longer for the cement based on the sol–gel derived glass than for the cement based on the melt-quenched one. The cements based on the sol–gel derived glass were stronger in both compression and biaxial flexure than the cements prepared from the melt-quenched glass. The differences in setting and mechanical properties were associated with both cation content in the glass phase and the different surface area of the resultant cements.