Poulsen S, Larson R H
J Dent Res. 1975 Jan-Feb;54(1):160-3. doi: 10.1177/00220345750540011201.
A study on various regimens by which the same total amount of neutral sodium fluoride is applied to the teeth of rats showed that greater effects were observed after frequent application of 0.2% solutions than after less frequent application of more concentrated solutions.
一项关于对大鼠牙齿应用相同总量中性氟化钠的不同方案的研究表明，与较少频率应用较高浓度溶液相比，频繁应用0.2%溶液后观察到的效果更佳。
