如果您有 Gum Disease, 牙龈就会萎缩，牙根就会慢慢地露出来,直至脱落。要看 Periodontist.

来源: 御用文人于 2015-03-06 11:37:36 [旧帖] [给我悄悄话] 本文已被阅读：次

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