Under suitable pHcondition,treatment of tooths surface with the lanthanum-containing a prescriptionchanged the structure of dental enamel and improved its acid resistance.

• 结论 :低浓度氟有利于使脱矿向再矿化方向转化 ,从而使龋齿得以修复。 在适宜的PH条件下 ,用含镧的制剂处理牙表面 ,改变了牙釉质的结构 ,提高牙釉质的抗酸能力。