Pedrini Denise, Delbem Alberto Carlos Botazzo, de França Juliana Gomes Macedo, Machado Thiago de Medeiros
Department of Surgery and Integrated Clinic, School of Dentistry of Araçatuba, São Paulo State University, Brazil.
Pesqui Odontol Bras. 2003 Apr-Jun;17(2):137-41. doi: 10.1590/s1517-74912003000200007. Epub 2003 Oct 10.
The release of fluoride from restorative materials (Vitremer, Ketac-Fil, Fuji II LC and Freedom) was evaluated during two 15-day periods, before and after a topical application of acidulated phosphate fluoride gel (APF). For each material, 6 specimens were made, which were immersed in 2 ml of deionized water. The fluoride concentration dosages in the solutions were read at intervals of 24 hours for 15 days. After this period, the specimens of each material received treatment with APF gel for 4 minutes and the fluoride released was analyzed at 24-hour intervals during the following 15 days. The analysis of variance and the Tukey test (p < 0.05) showed that the total mean fluoride released during the initial 15 days was greater for Vitremer and Ketac-Fil and lower for Fuji II LC and Freedom; and in the final 15 days there was a difference in release readings, with the greatest value for Vitremer, followed by Fuji II LC, Ketac-Fil and Freedom. The comparison of the results between the 1st day and the 16th day (after gel application) showed a greater fluoride release on the 16th day for Vitremer, Fuji II LC and Freedom and was equal for Ketac-Fil. Although all the materials evaluated gained fluoride with the application of APF, the data suggest that the resin-modified ionomers are more efficient in releasing fluoride to the medium than the other materials.
在局部应用酸化磷酸氟凝胶（APF）之前和之后的两个15天期间，评估了修复材料（Vitremer、Ketac-Fil、Fuji II LC和Freedom）中氟化物的释放情况。对于每种材料，制作了6个样本，将其浸入2毫升去离子水中。在15天内，每隔24小时读取溶液中的氟化物浓度剂量。在此期间之后，每种材料的样本接受APF凝胶处理4分钟，并在接下来的15天内每隔24小时分析释放的氟化物。方差分析和Tukey检验（p < 0.05）表明，在最初的15天内，Vitremer和Ketac-Fil释放的总平均氟化物较多，而Fuji II LC和Freedom较少；在最后的15天内，释放读数存在差异，Vitremer的值最大，其次是Fuji II LC、Ketac-Fil和Freedom。第1天和第16天（凝胶应用后）结果的比较表明，Vitremer、Fuji II LC和Freedom在第16天释放的氟化物更多，Ketac-Fil则相等。尽管所有评估的材料在应用APF后都获得了氟化物，但数据表明，树脂改性离聚物比其他材料在向介质中释放氟化物方面更有效。
