El-Badrawy W A, McComb D
University of Toronto, Faculty of Dentistry, Department of Restorative Dentistry, Ontario, Canada.
Oper Dent. 1998 Jan-Feb;23(1):2-9.
Acidic fluoride gels have been found to significantly damage conventional glass-ionomer cements. In this study the effect to acidulated phosphate fluoride (APF) and neutral fluoride gels on the recently introduced resin-modified glass ionomers and a polyacid-modified composite resin (Variglass) was studied using scanning electron microscopy (SEM). Five materials were examined: Photac-Fil, Fuji II LC, Vitremer, Variglass, and Ketac-Fil (control). Groups of five specimens of each material were treated for 24 hours with one of the following: 1) distilled water, 2) neutral fluoride gel, 3) APF gel. Surface micro-structure of treated specimens was examined using SEM, and microphotographs were evaluated using a three-point scale. APF was found to have a deleterious effect on all examined materials, while minimal effects resulted from the neutral fluoride gel compared to the control group. Although showing greater resistance to the APF gel than conventional glass-ionomer cements, resin-modified glass-ionomer materials revealed characteristic immersion and erosion behavior, substantiating their differentiation from a hybrid material containing a preponderance of resin.
已发现酸性氟化物凝胶会严重损害传统玻璃离子水门汀。在本研究中，使用扫描电子显微镜（SEM）研究了酸化磷酸氟（APF）和中性氟化物凝胶对最近推出的树脂改性玻璃离子体和一种聚酸改性复合树脂（Variglass）的影响。研究了五种材料：Photac-Fil、Fuji II LC、Vitremer、Variglass和Ketac-Fil（对照）。每种材料的五组样本分别用以下一种处理24小时：1）蒸馏水，2）中性氟化物凝胶，3）APF凝胶。使用SEM检查处理后样本的表面微观结构，并使用三点量表评估显微照片。发现APF对所有检测材料都有有害影响，而与对照组相比，中性氟化物凝胶的影响最小。尽管树脂改性玻璃离子体材料比传统玻璃离子水门汀对APF凝胶表现出更大的抗性，但它们显示出特有的浸泡和侵蚀行为，证实了它们与含大量树脂的混合材料的区别。
