Rolim Fabiana Gouveia, de Araújo Lima Allan David, Lima Campos Islany Cardoso, de Sousa Ferreira Robson, da Cunha Oliveira-Júnior Carlos, Gomes Prado Vera Lúcia, Vale Glauber Campos
Restorative Dentistry Department, Federal University of Piauí, Campus Universitario Ministro Petrônio Portella, SG10, 64049-550 Teresina, PI, Brazil.
Superior Education Institute of Parnaiba Valley, 64212-790 Parnaiba, PI, Brazil.
Int J Dent. 2019 Dec 10;2019:9785364. doi: 10.1155/2019/9785364. eCollection 2019.
This study aimed to evaluate F release from GICs before and after recharging with F-dentifrices and after aging process.
Fifteen specimens of GICs (conventional, resin modified, and high viscosity) and composite resin were stored individually in a polystyrene tube containing 2 ml of deionized water (DW), with water replacement every 24 hours. After 15 days, the specimens were treated with a dentifrice suspension (1 : 3 by volume) containing 0 g F/g ( = 5), 1,100 g F/g ( = 5), or 5,000 g F/g ( = 5). After 3 min, the specimens were rinsed and replaced in new tubes with 2 ml of DW. This procedure was performed 2x/day for 2 days. The readings were taken on days 1, 5, 10, and 15 before and after the treatments. A second experiment was performed, using the same specimens of the previous study that were submitted to an aging process (specimens were kept in 2 ml of DW, remaining at 37°C for 36 weeks). Readings using specific electrode for F detection were taken on days 1, 5, 10, and 15 after treatment of the samples as described above. Data were analyzed by ANOVA and Tukey's test with fixed at 5%.
It was observed that the highest release of F for all the GICs occurred on the first day after the treatments, especially when using a high-fluoride dentifrice, with decreasing release over time. Also, although aged GICs still recharge with F treatments, the amount of F released was lower than fresh materials.
GICs present a high F recharge and release capacity, especially in the first 24 hours and after the treatment with a high-fluoride dentifrice, even after material aging.
本研究旨在评估玻璃离子水门汀（GICs）在用含氟牙膏再充电前后以及老化过程后的氟释放情况。
将15个GICs样本（传统型、树脂改良型和高粘度型）以及复合树脂样本分别储存在装有2毫升去离子水（DW）的聚苯乙烯管中，每24小时更换一次水。15天后，样本用含氟牙膏悬浮液（体积比1∶3）处理，该悬浮液含0克氟/克（=5）、1100克氟/克（=5）或5000克氟/克（=5）。3分钟后，样本冲洗干净并更换到装有2毫升DW的新管中。此过程每天进行2次，持续2天。在处理前后的第1、5、10和15天进行读数。进行了第二项实验，使用前一项研究中的相同样本进行老化处理（样本保存在2毫升DW中，在37°C下放置36周）。按照上述方法处理样本后，在第1、5、10和15天使用特定的氟检测电极进行读数。数据采用方差分析和Tukey检验进行分析，设定为5%。
观察到所有GICs在处理后的第一天氟释放量最高，尤其是使用高氟牙膏时，且随着时间推移释放量减少。此外，尽管老化的GICs在用氟处理后仍能再充电，但释放的氟量低于新鲜材料。
GICs具有较高的氟再充电和释放能力，尤其是在最初24小时以及用高氟牙膏处理后，即使材料老化也是如此。
