Forsten L
Institute of Dentistry, University of Turku, Finland.
Acta Odontol Scand. 1995 Aug;53(4):222-5. doi: 10.3109/00016359509005976.
The aim was to study the short- and long-term fluoride release from resin-modified glass ionomer cements (GIC). The aim was also to determine the effect of fluoride treatment of 9-month-old specimens, consistency of the mix, and pH of the environment on the fluoride release. GIC test specimens were continually exposed to running water, and the fluoride release was measured periodically by storing the specimens in 5 ml deionized water for 1 week and measuring the fluoride content of the solution. After 24 h, 1 month, 9 months, and 11 months in running water four of the six resin-modified GICs released as much as or more fluoride than the auto-curing GIC tested for comparison. Fluoride treatment after 9 months also increased the fluoride release of these four brands, as was the case with the conventional GIC. At 24 h and 1 month two of the resin-modified GICs released smaller amounts of fluoride than the other materials, and the fluoride treatment used on those had no or only a minimal effect. Thin consistency of a mix resulted in higher fluoride release for one resin-modified material than a thick mix. Low pH increased the fluoride release for all materials.
本研究旨在探讨树脂改性玻璃离子水门汀（GIC）的短期和长期氟释放情况。同时，确定对9个月龄试件进行氟处理、材料混合稠度以及环境pH值对氟释放的影响。将GIC测试试件持续暴露于流动水中，通过将试件置于5毫升去离子水中保存1周并测量溶液中的氟含量，定期测定氟释放量。在流动水中放置24小时、1个月、9个月和11个月后，六种树脂改性GIC中的四种释放的氟与用于比较的自凝GIC相同或更多。9个月后进行氟处理也增加了这四个品牌的氟释放量，传统GIC也是如此。在24小时和1个月时，两种树脂改性GIC释放的氟量比其他材料少，对其进行的氟处理没有效果或只有极小的效果。对于一种树脂改性材料，混合液的稀稠度低时比稠度高时氟释放量更高。低pH值会增加所有材料的氟释放量。
