使用牙線不是很明顯的嗎，還要研究？否則食物殘渣也清除不幹淨。不過據牙醫說，牙線不要直上直下，以免擠壓牙齦，加重牙齦退縮

來源: Manymore 於 2016-10-17 13:35:48 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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