四种玻璃离子充填材料释氟性与溶解性的研究

目的 比较4种玻璃离子充填材料短期内氟离子释放能力和溶解性,为临床选择充填材料提供依据.方法 实验选取1种传统型玻璃离子水门汀(SC),2种高强度玻璃离子水门汀FujiⅨ(F9)和Ketac Moler(KM),1种树脂改良型玻璃离子水门汀FujiIILC (F2LC),和1种复合树脂Z100( CR,3M)共5种材...

Fluoride release and solubility testing of 4 glass-ionomer restorative materials

Objective To evaluate the fluoride release and the solubility of 4 glass-ionomer restorative materials. Method Five kinds of glass-ionomer restorative materials were used in this study： a traditional glass ionomer cements（SC,Shanghai）,two high-viscous glass ionomer cements FujiⅨ（F9,GC） and Ketac Moler（KM,3M）,a resin-modified glass ionomer cements Fuji IILC（F2LC,GC）,and a composite resin Z100（CR,3M）.Twelve disk-shaped specimens（10 mm x 1 mm） of each material were prepared,which were divided into fluoride-releaseing testing group and solution testing group equally.Each specimen was immersed in deionized water for 21 days.The cumulative fluoride release was measured by Ion Chromatography.The solubility was determined by weighting the samples before and after water immersion and desiccation,and the ratio（fluoride release / solubility）was computed. Results The fluoride release of 5 kinds of materials showed a decreasing tendency from SC,FM,F9,F2LC to CR.There was no significant difference among F9 and KM,F9 and F2LC in fluoride release（P0.05）.There were significant differences in solubility among the materials as the following rankings：F2LCSCF9KMCR（P0.05）.The ratio（fluoride release / solubility） decreased in the following order： F2LCSCF9KMCR.The cumulative fluoride release rates of four glass-ionomers were linear with respect to solubility with r= 0.9769（P0.01）. Conclusion The fluoride release and the solubility of traditional glass ionomer cements,high-viscous glass ionomer cements and resin-modified glass ionomer cements successively decline.Glass ionomer cements with higher fluoride release have lower water stability.The ratio（fluoride release / solubility） of resin-modified glass ionomer cements is higher than traditional glass ionomer cements and high-viscous glass ionomer cements.