Williams J A, Billington R W, Pearson G J
Department of Biomaterials Science, Eastman Dental Hospital, London, UK.
J Oral Rehabil. 2001 Jan;28(1):41-7. doi: 10.1046/j.1365-2842.2001.00628.x.
The objective of this study was to determine long term release of fluoride from a resin-modified glass-ionomer cement (RMGIC) (Fuji II LC (FLC)) compared with that from two conventional acid-base setting cements (HiDense (HD) and KetacSilver (KS)) marketed for similar restorative purposes. Fluoride release from discs of cement immersed in water or artificial saliva was measured for 2.7 years using an ion selective electrode technique. The RMGIC was affected by water if immersed immediately after setting. This is similar to conventional acid-base cements and the experimental method was designed to allow for this. Over the 2.7-year period, the RMGIC and HD released similar amounts of fluoride into both water and artificial saliva. In water, the RMGIC released the most fluoride, while in artificial saliva the highest release was from HD. KS released the least amount of fluoride in both immersing liquids. In artificial saliva, release was reduced to 17-25% of that found in water, with the RMGIC showing the greatest reduction. Both acid-base cured cements showed changes in colour over the 2.7-year span, while the colour of the RMGIC was stable. It was concluded that the RMGIC released equivalent or greater amounts of fluoride than the two acid-base cure glass-ionomers over a period of 2.7 years.
本研究的目的是测定树脂改性玻璃离子水门汀（RMGIC）（富士II LC（FLC））与两种用于类似修复目的的传统酸碱固化水门汀（高密质（HD）和KetacSilver（KS））相比的长期氟释放情况。使用离子选择性电极技术，对浸泡在水或人工唾液中的水门汀圆盘的氟释放量进行了2.7年的测量。如果在凝固后立即浸泡，RMGIC会受到水的影响。这与传统酸碱水门汀类似，实验方法也是为此而设计的。在2.7年的时间里，RMGIC和HD在水和人工唾液中释放的氟量相似。在水中，RMGIC释放的氟最多，而在人工唾液中，HD释放量最高。KS在两种浸泡液体中释放的氟量最少。在人工唾液中，释放量降至水中的17%-25%，RMGIC的降幅最大。两种酸碱固化水门汀在2.7年的时间里颜色都发生了变化，而RMGIC的颜色保持稳定。研究得出结论，在2.7年的时间里，RMGIC释放的氟量与两种酸碱固化玻璃离子水门汀相当或更多。
