磷酸锌水门汀基在内漂白中的抗渗漏作用

Study of the effect of zine oxide phosphorate base on preventing leakage in intracoronal bleaching

目的研究髓室内漂白时，磷酸锌水门汀基对抗过氧化氢渗漏的作用。方法对离体牙行内漂白，用分光光度法检测过氧化氢渗漏量。结果漂白前平齐釉牙骨质界水平制备磷酸锌水门汀基，过氧化氢渗漏量显著减少。

Objective To study the effect of zinc oxide phosphorate base on preventing hydrogen peroxide leakage in intracoronal bleaching.Methods Intracoronal bleaching was given to exsomatized teeth,and the amounts of penetrated hydrogen peroxide was determind by spectro photo metry.Results Placement of a zinc oxide phosphorat protective base at CEJ level decreased hydrogen peroxide.penetration dramatically.Conclusion The zine oxide phosphorate base was a kind of effctive measure to prevent post bleaching external cervical resorption.