Forss H, Jokinen J, Spets-Happonen S, Seppä L, Luoma H
Faculty of Dentistry, University of Kuopio, Finland.
Caries Res. 1991;25(6):454-8. doi: 10.1159/000261410.
The aim of this study was to compare the levels of fluoride and mutans streptococci in plaque grown on glass ionomer (Ketac-Fil) and composite (Silar) restorations in vivo. From tunnels left under the brackets bonded either with glass ionomer or composite, 14-day-old plaque samples were collected 14, 28, and 42 days after bonding. For glass ionomer the mean counts of mutans streptococci in plaque were 0.5 x 10(3), 6.7 x 10(3), and 8.8 x 10(3) CFU at the first, second, and third collection, respectively, whereas for composite restorations the corresponding values were 32.1 x 10(3), 14.6 x 10(3), and 120.6 x 10(3) CFU. For glass ionomer the mean concentrations of fluoride were 19,985, 5,788, and 5,019 ppm at first, second, and third collections of 14-day-old plaque samples, respectively, whereas for composite restorations the mean concentrations of fluoride were about 200 ppm throughout the study. The results show that the fluoride level in plaque growing on glass ionomer is much higher than that on composite restorations which seems to affect the level of mutans streptococci in dental plaque.
本研究的目的是比较体内在玻璃离子水门汀（Ketac-Fil）和复合树脂（Silar）修复体上形成的菌斑中氟化物和变形链球菌的水平。从用玻璃离子水门汀或复合树脂粘结的托槽下方留下的通道中，在粘结后14、28和42天收集14日龄的菌斑样本。对于玻璃离子水门汀，第一次、第二次和第三次采集时菌斑中变形链球菌的平均计数分别为0.5×10³、6.7×10³和8.8×10³CFU，而对于复合树脂修复体，相应的值分别为32.1×10³、14.6×10³和120.6×10³CFU。对于玻璃离子水门汀，在第一次、第二次和第三次采集14日龄菌斑样本时，氟化物的平均浓度分别为19985、5788和5019ppm，而对于复合树脂修复体，在整个研究过程中氟化物的平均浓度约为200ppm。结果表明，在玻璃离子水门汀上生长的菌斑中的氟化物水平远高于复合树脂修复体上的氟化物水平，这似乎会影响牙菌斑中变形链球菌的水平。
