Methods Intracoronal bleaching was given to exsomatized teeth, and the amounts of penetrated hydrogen peroxide was deter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。
Objective To study the effect of zinc-oxide phosphorate base on preventing hydrogen peroxide leakage in intracoronal ble摘要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。