牙科 / 冷光美白能維持多久?

<strong><span style="font-size: 12pt; font-family: 標楷體; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;">冷光美白</span></strong><b><span style="font-size: 12pt; font-family: 標楷體; background-image: initial; background-attachment: initial; background-size: initial; background-origin: initial; background-clip: initial; background-position: initial; background-repeat: initial;">會有後遺症嗎<span lang="EN-US">?</span>牙齒會不會變得容易敏感酸痛<span lang="EN-US">?</span>還有能維持多久呢<span lang="EN-US">?</span></span></b>