什麽叫不正確的位置？指美觀而言還是健康而言？據我所知：大多數是為了美觀。牙醫的廣告也直言，為了可愛的笑容。

來源: 薛成於 2015-06-23 13:49:38 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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