一种复合体和四种树脂化玻璃离子水门汀的氟离子释放测定

An assessment of fluoride release from a compomer and four resin modified glass ionomers

目的 比较 1种复合体 (Dyract)和 4种树脂化玻璃离子水门汀 (FujiIILC ,Photac Fil,VariGlass,Vitremer)在水中释放氟离子的能力。方法 用氟离子选择电极 ,分别在第 1、7、30d直至2 5 3d ,测定 5种材料固化后标本浸泡溶液中的氟离子浓度。结果 除复合体以外的所有材料 ,均显示了高的初期氟离子释放并急剧下降 ,然后缓慢下降。结论 复合体释放的氟离子比树脂化玻璃离子水门汀少。对于龋病高发的患者 。

Objective To compare the fluoride release into water from a compomer (Dyract) and four resin modified glass ionomer cements (Fuji II LC, Photac Fil, VariGlass, Vitremer).Methods Five specimens of each material were prepared according to manufacturers' instructions and placed into 3.0 mm diameter ×2.7 mm thick disposable Teflon molds. The specimens were placed in well sealed polypropylene vials with 2 ml of de ionized water and stored in an incubator at 37℃. The solutions were replaced weekly and the levels of fluoride (ppm) were analysed at day 1, 7, 30 and subsequently every 28 days for 253 days. The results were analysed using one way ANOVA followed by the Student Newman Keuls range test.Results All materials except the compomer (Dyract) showed high initial release values of fluoride which decreased exponentially, then showed a slow decline during the ensuing time. Initial fluoride release values were significantly different between Dyract, VariGlass, and the three other resin modified glass ionomers. The compomer released significantly less fluoride than did the other resin modified glass ionomers.Conclusion With high caries risk patients, it may be most beneficial to use a high fluoride release resin modified glass ionomer cement as the restorative material of choice.