玻璃离子粘固剂及复合体氟离子体外释放的比较

Comparison of Fluoride Release from Glass-ionomer Cements and a Compomer in Vitro.

目的:比较不同类型玻璃离子粘固剂(GIC)及复合体在体外释放氟离子的能力。方法:选择树脂改良型GIC(VITREBOND;FUJIⅡLC),传统型GIC(FUJIⅡ;国产GIC;GLASLONOMER)及复合体(DYRACT)作为实验对象。使用氟离子选择电极,连续14d测定各种材料固化后标本浸泡溶液中的氟离子浓度,采用光固化树脂(Z100)作为实验对照组。实验数据采用单因素方差分析和q检验法检验。结果:5种GIC均显现出较高的初期氟离子释放,2 d后氟离子释放趋于平稳;复合体显现出一种平缓的氟离子释放状态。树脂改良型GIC的累计氟离子释放量明显高于其他材料,其由高到低的顺序为:VITREBOND>FUJIⅡLC>国产GIC>DYRACT>FUJIⅡ>GLASLONO-MER(P<0.05)。结论:树脂改良型GIC较传统型GIC和复合体具有更好的氟离子释放能力,在预防继发龋上可能具有一定的优势。

Objective ： To compare the fluoride release from two resin-modified glass-ionomer cements （GIC） （ VIT-REBOND, FUJI Ⅱ LC）, three traditional GIC （GIC made in shanghai, FUJI Ⅱ, GLASLONOMER） and a compomer （DYRACT） in vitro. Methods： Five specimens of each material were prepared according to manufacturers＇instructions and placed into 10 mm diameter×6 mm thick disposable Teflon molds. The specimens were placed in well-sealed polypropylene vials with 20 ml of de-ionized water. The levels of fluoride were analyzed every day for ld days. Light- cured resin （Z100） was used as control. The date were analyzed with one-way ANOVA. Results： All materials except the compomer （DYRACT） showed high initial release values of fluoride＇, then showed a slow decline during the ensuing time. Accumulative total release values of fluoride was： VITREBOND 〉 FUJI Ⅱ LC 〉 GIC made in shanghai 〉 DYRACT 〉 FUJI Ⅱ 〉 GLASLONOMER. Conclusion： For high caries risk patients, it may be beneficial to use a resin-modified GIC as the restorative material,