Paschoal Marco Aurélio Benini, Gurgel Carla Vecchione, Rios Daniela, Magalhães Ana Carolina, Buzalaf Marília Afonso Rabelo, Machado Maria Aparecida de Andrade Moreira
Department of Pediatric Dentistry, Orthodontics and Community Health, Bauru Dental School, USP - University of São Paulo, Bauru, SP, Brazil.
Braz Dent J. 2011;22(4):275-9. doi: 10.1590/s0103-64402011000400002.
The present study aimed to compare the fluoride (F-) release pattern of a nanofilled resin-modified glass ionomer cement (GIC) (Ketac N100 - KN) with available GICs used in dental practice (resin-modified GIC - Vitremer - V; conventional GIC - Ketac Molar - KM) and a nanofilled resin composite (Filtek Supreme - RC). Discs of each material (n=6) were placed into 4 mL of deionized water in sealed polyethylene vials and shaken, for 15 days. F- release (μg F-/cm²) was measured each day using a fluoride-ion specific electrode. Cumulative F- release means were statistically analyzed by linear regression analysis. In order to analyze the differences among materials and the influence of time in the daily F- release, 2-way ANOVA test was performed (α=0.05). The linear fits between the cumulative F- release profiles of RC and KM and time were weak. KN and V presented a strong relationship between cumulative F- release and time. There were significant differences between the daily F- release overtime up to the third day only for GICs materials. The daily F- release means for RC were similar overtime. The results indicate that the F- release profile of the nanofilled resin-modified GIC is comparable to the resin-modified GIC.
本研究旨在比较一种纳米填充树脂改性玻璃离子水门汀（GIC）（Ketac N100 - KN）与牙科实践中使用的现有GIC（树脂改性GIC - Vitremer - V；传统GIC - Ketac Molar - KM）以及一种纳米填充树脂复合材料（Filtek Supreme - RC）的氟化物（F-）释放模式。将每种材料的圆盘（n = 6）放入密封的聚乙烯小瓶中的4 mL去离子水中，并振荡15天。每天使用氟离子特异性电极测量F-释放量（μg F-/cm²）。通过线性回归分析对累积F-释放平均值进行统计分析。为了分析材料之间的差异以及时间对每日F-释放的影响，进行了双向方差分析（α = 0.05）。RC和KM的累积F-释放曲线与时间之间的线性拟合较弱。KN和V在累积F-释放与时间之间呈现出很强的关系。仅在第三天之前，GIC材料的每日F-释放随时间存在显著差异。RC的每日F-释放平均值随时间相似。结果表明，纳米填充树脂改性GIC的F-释放模式与树脂改性GIC相当。
