Objective To study the effect of zinc-oxide phosphorate base on preventing hydrogen peroxide leakage in intracoronal bleaching.

摘要目的研究髓室内，磷酸锌基对抗过氧氢渗漏的作用。

Conclusion The zine oxide phosphorate base was a kind of effctive measure to prevent post-bleaching external cervical resorption.

结论磷酸锌基是防治内后牙颈部外吸收的一种有效方法。