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

摘要目研究髓室内漂白时，磷酸锌水门抗过氧氢渗漏。

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

结论磷酸锌水门是防治内漂白后牙颈部外吸收一种有效方法。