Cooley R L, Robbins J W, Barnwell S
Department of General Practice, University of Texas Health Science Center, School of Dentistry, San Antonio.
J Prosthet Dent. 1990 Dec;64(6):651-3. doi: 10.1016/0022-3913(90)90289-o.
This laboratory study evaluated the dimensional stability of two reinforced glass ionomers (Ketac-Silver and Fuji Miracle Mix) in comparison with amalgam. Ten core build-ups were prepared with each material on extracted human teeth. Four Minim pins were placed in each tooth for retention. A gold casting was made for each core build-up. The specimens were placed in a distilled water and the distance between the casting and the tooth was measured at 1 hour, 6 hours, and then every 24 hours for 7 days. After 7 days, the measured changes were small, ranging from 1 to 63 microns. The reinforced glass ionomers were found to be dimensionally stable in moisture over a period of 7 days.
这项实验室研究评估了两种增强型玻璃离子水门汀（Ketac-Silver和Fuji Miracle Mix）与汞合金相比的尺寸稳定性。在拔除的人牙上用每种材料制备了10个核桩修复体。每个牙齿中放置4个微型钉以进行固位。为每个核桩修复体制备一个金铸件。将标本置于蒸馏水中，并在1小时、6小时，然后在7天内每24小时测量铸件与牙齿之间的距离。7天后，测量到的变化很小，范围为1至63微米。发现增强型玻璃离子水门汀在7天的时间内在潮湿环境中尺寸稳定。
