Attar Nuray, Turgut Melek D
Department of Restorative Dentistry, Faculty of Dentistry, Hacettepe University, Ankara, Turkey.
Oper Dent. 2003 Jul-Aug;28(4):395-402.
Many fluoride-releasing dental materials are being sold on the basis of their cariostatic properties. However, the amount fluoride release of these materials is still uncertain. This study investigated the fluoride release and uptake characteristics of four flowable resin composites (Heliomolar Flow, Tetric Flow, Wave, Perma Flo), one flowable compomer (Dyract flow), one conventional glass ionomer cement mixed with two different powder/liquid ratios (ChemFlex Syringeable and ChemFlex Condensable), one packable resin composite (SureFil), one ion-releasing composite (Ariston pHc) and one resin-modified glass ionomer cement (Vitremer). Seven discs (6-mm diameter and 1.5-mm height) were prepared for each material. Each disc was immersed in 3.5 ml of deionized water within a plastic vial and stored at 37 degrees C. The deionized water was changed every 24 hours and the release of fluoride was measured for 30 days. At the end of this period, the samples were recharged with 2 ml of 1.23% acidulated phosphate fluoride (APF) gel for four minutes. Then, all samples were reassessed for an additional 10 days. The fluoride release of all samples was measured with a specific fluoride electrode and an ionanalyzer. Statistical analyses were conducted using two-way repeated measure ANOVA and Duncan's multiple range tests. For all tested materials, the greatest fluoride release was observed after the first day of the study (p<0.01) but gradually diminished with time. During the test period, Tetric Flow released the lowest amount of fluoride; however, no statistically significant difference was found from Wave and Heliomolar Flow (p>0.05). Ariston pHc released the highest amount of fluoride, followed by ChemFlex Syringeable, Vitremer and ChemFlex Condensable. There were statistically significant differences among these materials (p<0.05). Fluoride release of all materials were significantly increased after the first day following refluoridation and Ariston pHc released the greatest among all materials (p<0.01). At the end of two days of refluoridation, the fluoride release rate for each material dropped quickly and stabilized within three days.
许多释放氟的牙科材料因其防龋性能而被销售。然而，这些材料的氟释放量仍不确定。本研究调查了四种可流动树脂复合材料（Heliomolar Flow、Tetric Flow、Wave、Perma Flo）、一种可流动复合体（Dyract flow）、一种与两种不同粉液比混合的传统玻璃离子水门汀（ChemFlex Syringeable和ChemFlex Condensable）、一种可压实树脂复合材料（SureFil）、一种离子释放复合材料（Ariston pHc）和一种树脂改性玻璃离子水门汀（Vitremer）的氟释放和吸收特性。每种材料制备七个圆盘（直径6毫米，高1.5毫米）。每个圆盘浸入装有3.5毫升去离子水的塑料小瓶中，并在37摄氏度下储存。每24小时更换一次去离子水，并测量30天内的氟释放量。在此期间结束时，将样品用2毫升1.23%的酸化磷酸氟（APF）凝胶再处理4分钟。然后，对所有样品再评估10天。使用特定的氟电极和离子分析仪测量所有样品的氟释放量。采用双向重复测量方差分析和邓肯多重范围检验进行统计分析。对于所有测试材料，在研究的第一天后观察到最大的氟释放量（p<0.01），但随时间逐渐减少。在测试期间，Tetric Flow释放的氟量最低；然而，与Wave和Heliomolar Flow相比，未发现统计学上的显著差异（p>0.05）。Ariston pHc释放的氟量最高，其次是ChemFlex Syringeable、Vitremer和ChemFlex Condensable。这些材料之间存在统计学上的显著差异（p<0.05）。再氟化后的第一天，所有材料的氟释放量均显著增加，且Ariston pHc在所有材料中释放量最大（p<0.01）。再氟化两天结束时，每种材料的氟释放率迅速下降，并在三天内稳定下来。
