Eichmiller F C, Giuseppetti A A, Hoffman K M, Brajdic D R, Miksch V, Delorey-Lytle J A
American Dental Association Health Foundation Paffenbarger Research Center, National Institute of Standards and Technology, Gaithersburg, MD 20899, USA.
Oper Dent. 1999 May-Jun;24(3):162-71.
Microleakage of an experimental direct filling material comprised of a chemically precipitated silver powder that had been surface treated with a dilute acid to promote cold welding upon consolidation was evaluated. Microleakage was compared to both dispersed-phase and spherical amalgam by use of an in vitro gas-diffusion method and in class 5 restorations placed in extracted human teeth. The effect of two cavity varnishes and two dentin adhesives as cavity liners on microleakage was also evaluated using extracted teeth. Microleakage of silver powder consolidated with dental instruments was less than that found with dental amalgam. The use of copal or polyamide cavity varnish resulted in the lowest combination of microleakage on dentin and enamel margins.
对一种实验性直接充填材料的微渗漏情况进行了评估，该材料由经过稀酸表面处理以促进固化时冷焊的化学沉淀银粉组成。通过体外气体扩散法以及在拔除的人牙中制备的5类修复体，将该材料的微渗漏情况与分散相汞合金和球形汞合金进行了比较。还使用拔除的牙齿评估了两种窝洞封闭剂和两种牙本质黏结剂作为窝洞衬层对微渗漏的影响。用牙科器械压实的银粉的微渗漏小于牙科汞合金的微渗漏。使用柯巴脂或聚酰胺窝洞封闭剂导致牙本质和釉质边缘微渗漏的组合最低。
