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Where do tooth decay bacteria come from? When is it most likely? We asked a dental expert Spoons, tableware, and kisses Parents' saliva is infectious 19 to 31 months old when baby teeth begin to grow is the ``window of infection'' Some dentists say ``diet is everything'' rather than tooth brushing Sukusuku Voice Ranking Featured by the editorial team! Sukusuku voice

Yoshito Miwa (July 1, 2019 Tokyo Shimbun morning edition partially revised) There are probably many families who struggle to brush their teeth in the morning and at night because they want to prevent tooth decay in their children. How can tooth decay be done in the first place? decay...