It can not. The discoloration is intrinsic, the Tetracycline is

來源: chinesebuns 於 2012-01-13 14:43:09 [] [博客] [舊帖] [給我悄悄話] 閱讀數 : (276 bytes)
回答: 四環素牙如何漂白 由 18.0 於 2012-01-13 13:54:47

Into the the teeth internal structure during the calcification
Process of the teeth/bone development of a human being.
So dental bleaching is not affective. Most people
Achieved the best esthetic results through gettting porcelain
Fused to metal crowns on the front teeth.

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