Department of Restorative Dentistry, Piracicaba School of Dentistry, University of Campinas, Piracicaba, Brazil.
Oper Dent. 2012 Jan-Feb;37(1):63-70. doi: 10.2341/10-328-L. Epub 2011 Sep 26.
This study evaluated the effects of curing modes and storage conditions on fluoride release of resin cements. In phase 1, the cumulative fluoride release rate from samples of the resin cements (Panavia F 2.0, RelyX Unicem, MaxCem, and BisCem) was quantified after 15 days storage in water (n=4). In phase 2, the fluoride release profiles from the same materials were analyzed during pH cycling (n=4). In this second phase, fluoride was measured at specific times (one, two, three, five, eight, and 15 days). Disk-shaped specimens were prepared (10 mm × 0.5 mm), and the materials were either light activated or allowed to autopolymerize. For both phases, the fluoride release was measured using a fluoride ion-specific electrode. The fluoride release in water was not affected by the curing mode of RelyX Unicem and Maxcem resin cements. Panavia F. 2.0 and BisCem resin cements, either light cured or autopolymerized modes, released higher amounts of fluoride in water than the other self-adhesive cements. In phase 2, the concentration of fluoride released decreased from the first day of pH cycling until the 15th day for all resin cements, for both curing modes, regardless of the storage solution used (demineralizing/remineralizing). The fluoride release rate during pH cycling by Panavia F 2.0 and MaxCem was not affected by the curing mode. The effect of the curing mode on fluoride ion release in water or during pH cycling was product dependent.
本研究评估了固化模式和储存条件对树脂水门汀氟释放的影响。在第 1 阶段，将 Panavia F 2.0、RelyX Unicem、MaxCem 和 BisCem 这几种树脂水门汀样本在水中储存 15 天后，定量测定其累积氟释放率（n=4）。在第 2 阶段，分析相同材料在 pH 循环期间的氟释放情况（n=4）。在第二阶段，在特定时间（1、2、3、5、8 和 15 天）测量氟化物。制备圆盘状样本（10mm×0.5mm），材料用光激活或允许自聚合。对于这两个阶段，均使用氟离子专用电极测量氟释放。水激活的 RelyX Unicem 和 MaxCem 树脂水门汀的固化模式对水释放的氟没有影响。Panavia F. 2.0 和 BisCem 树脂水门汀，无论是光固化还是自聚合模式，在水中释放的氟化物都比其他自粘水门汀多。在第 2 阶段，所有树脂水门汀，无论使用何种固化模式和储存溶液（脱矿质/再矿化），在 pH 循环的第一天到第 15 天，释放的氟化物浓度均逐渐降低。Panavia F 2.0 和 MaxCem 在 pH 循环过程中的氟释放速率不受固化模式的影响。固化模式对水或 pH 循环过程中氟离子释放的影响取决于产品。
