Roth S
Aust Dent J. 1991 Oct;36(5):384-90. doi: 10.1111/j.1834-7819.1991.tb01362.x.
This laboratory study investigated the use of various glass ionomer cements for retrograde root filling from the point of view of sealing qualities, ion release and ease of application. The sealing qualities of the material were tested by dye penetration and microscopic and SEM examination. Fluoride and silver ion release tests showed an initial loss of these two ions from the glass ionomer cement. A modified system for mixing and application was developed. Dye penetration did not differ from that of controls using vertically condensed gutta-percha. Glass ionomer cement is possibly a clinical alternative for the sealing of retrograde cavities; however, the silver-reinforced materials may cause tissue irritation from release of silver ions and their corrosion products.
这项实验室研究从密封性能、离子释放和应用便捷性的角度，对各种玻璃离子水门汀用于根管倒充填进行了调查。通过染料渗透、显微镜检查和扫描电子显微镜检查对材料的密封性能进行了测试。氟化物和银离子释放测试表明，这两种离子最初会从玻璃离子水门汀中流失。开发了一种改良的混合和应用系统。染料渗透与使用垂直加压牙胶的对照组无异。玻璃离子水门汀可能是根管倒充填密封的一种临床替代材料；然而，含银增强材料可能会因银离子及其腐蚀产物的释放而引起组织刺激。
