Hallgren A, Oliveby A, Twetman S
Medical and Dental Health Center, Halmstad, Sweden.
Caries Res. 1990;24(4):239-41. doi: 10.1159/000261274.
Salivary fluoride concentrations were determined in 10 children (mean age 12.0 years) undergoing fixed orthodontic therapy. The orthodontic appliances, a minimum of 4 bands and 8 brackets, were cemented with a glass ionomer cement. Unstimulated whole saliva was collected 4 times a day before (baseline value) and at 1, 7, 14 and 28 days after cementation. The samples of saliva were centrifuged and the supernatants were analyzed with a fluoride-sensitive electrode. At baseline, the mean salivary fluoride concentration was 0.85 mumol/l. There was a significant increase during the day after cementation (1.88 mumol/l). After 7, 14 and 28 days, salivary fluoride levels were slightly elevated, but not statistically different from the baseline values. The ingested fluoride dose during the 1st day was estimated to be 0.02 mg. It is concluded that in orthodontic treatment with fixed appliances, a slow release of fluoride from glass ionomer cements could exert a local cariostatic effect on adjacent caries-susceptible enamel.
对10名接受固定正畸治疗的儿童（平均年龄12.0岁）的唾液氟浓度进行了测定。正畸矫治器至少有4个带环和8个托槽，用玻璃离子水门汀黏固。在黏固前（基线值）以及黏固后第1、7、14和28天，每天收集4次非刺激性全唾液。将唾液样本离心，用上氟离子敏感电极分析上清液。基线时，唾液氟平均浓度为0.85μmol/L。黏固后当天显著升高（1.88μmol/L）。7、14和28天后，唾液氟水平略有升高，但与基线值无统计学差异。第1天摄入的氟剂量估计为0.02mg。得出的结论是，在使用固定矫治器的正畸治疗中，玻璃离子水门汀缓慢释放氟可对相邻的易患龋釉质产生局部防龋作用。
