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口の中が酸性になっても、唾液の力で中和されて溶けたエナメル質も復活する。ただし、30分ほど時間がかかる。

食後すぐに歯をゴシゴシと磨くと軟らかくなったエナメル質を削り落としかねない。とはいえ、自分が食べた食事が酸性かどうか見分けるのは難しい。そこで「食後は歯磨きまで30分ほど置くのが安全策」（北迫助教）。

— 食後すぐの歯磨きはＮＧ　虫歯予防の新常識　　：日本経済新聞 (via tubattism)

(via do-nothing)

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