Basso Gabriela Romanini, Della Bona Alvaro, Gobbi Delton Luiz, Cecchetti Dileta
Dental School, Federal University of Santa Catarina, Florianópolis, SC, Brazil.
Braz Dent J. 2011;22(5):355-8. doi: 10.1590/s0103-64402011000500001.
The aim of this study was to evaluate in vitro fluoride (F) release from 4 restorative materials (3M ESPE): Ketak Molar Easymix [KME - conventional glass ionomer cement (GIC)]; Rely-X luting 2 [RL2 - resin-modified GIC (RMGIC)]; Vitremer (VIT- RMGIC); and Filtek Z250 [Z250 - negative control]. Disc-shaped specimens were fabricated according to the manufacturer's instructions and placed into 10 mL of reverse osmosis water at 37°C until the analyses were done using a liquid membrane for selective F ion electrode (Orion 710). F release was evaluated every 6 h in the first day and thereafter daily during 28 days (d). The results were analyzed statistically by two-way ANOVA and Tukey's test (α=0.05). Mean F release and standard deviation values (in ppm) were: KME: 6 h- 0.34 ± 0.04; 24 h- 1.22 ± 0.30; 7 d- 0.29 ± 0.09; 14 d- 0.20 ± 0.04; 28 d- 0.16 ± 0.01; RL2: 6 h- 2.46 ± 0.48; 24 h-12.33 ± 2.93; 7 d- 1.37 ± 0.38; 14 d- 0.80 ± 0.13; 28 d- 0.80 ± 0.21; VIT: 6 h- 0.98 ± 0.35; 24 h- 4.35 ± 1.22; 7 d- 0.66 ± 0.23; 14 d- 0.40 ± 0.07; 28 d- 0.39 ± 0.08; Z250: 6 h- 0.029 ± 0.001; 24 h- 0.024 ± 0.009; 7 d- 0.023 ± 0.004; 14 d- 0.025 ± 0.001; 28 d- 0.028 ± 0.001. RL2 RMGIC released more F than the other materials in all periods. The greatest release of F occurred in the first 24 h.
本研究的目的是评估4种修复材料（3M ESPE）的体外氟（F）释放情况：Ketak Molar Easymix [KME - 传统玻璃离子水门汀（GIC）]；Rely-X luting 2 [RL2 - 树脂改性玻璃离子水门汀（RMGIC）]；Vitremer（VIT - RMGIC）；以及Filtek Z250 [Z250 - 阴性对照]。根据制造商的说明制作圆盘形试样，并将其置于37°C的10 mL反渗透水中，直至使用液膜选择性氟离子电极（Orion 710）进行分析。在第一天每6小时评估一次F释放情况，此后在28天（d）内每天评估一次。结果通过双向方差分析和Tukey检验进行统计学分析（α = 0.05）。平均F释放量和标准差（以ppm为单位）值如下：KME：6小时 - 0.34±0.04；24小时 - 1.22±0.30；7天 - 0.29±0.09；14天 - 0.20±0.04；28天 - 0.16±0.01；RL2：6小时 - 2.46±0.48；24小时 - 12.33±2.93；7天 - 1.37±0.38；14天 - 0.80±0.13；28天 - 0.80±0.21；VIT：6小时 - 0.98±0.35；24小时 - 4.35±1.22；7天 - 0.66±0.23；14天 - 0.40±0.07；28天 - 0.39±0.08；Z250：6小时 - 0.029±0.001；24小时 - 0.024±0.009；7天 - 0.023±0.004；14天 - 0.025±0.001；28天 - 0.028±0.001。在所有时间段内，RL2 RMGIC释放的F比其他材料更多。F的最大释放发生在最初的24小时内。
