氟离子导入过敏牙本质后的扫描电镜观察

Observations by SEM after fluoride iontophoresis into hypersensitive dentin

目的 研究氟离子导入过敏牙本质后牙本质小管的形态变化。方法 在两只恒河猴及五名志愿者的健康恒牙上暴露牙本质 ,实验组行氟离子导入 ,对照组行去离子水导入 ,利用扫描电镜观察牙本质小管形态变化。结果 机械暴露牙本质后再进行酸处理 ,可以去除牙本质玷污层 ,开放牙本质小管 ;2 %NaF离子导入所形成的晶体对开放的牙本质小管具有良好的堵塞作用。结论 氟离子导入法治疗牙本质过敏症是有效的。

Objective To study the conditions and alterations of dentin tubule orifices after fluoride iontophoresis into hypersensitive dentin. Methods The dentin was exposed on the permanent teeth of two monkeys and five volunteers. The experimental group were treated with fluoride iontophoresis,and the control group,with deionized water iontophoresis. The conditions and alterations of dentin tubule orifices were observed by Scanning Electron Microscopy (SEM). Results The dentin tubule orifices could be opened by mechanical exposing and etching dentin to remove smear layer,and the opened dentin tubules could be blocked effectively by the crystals formed after 2% sodium fluoride iontophoresis.Conclusion It is effective that fluoride iontophoresis treats dentin hypersensitivity.