I've always had exceptional dental hygiene and take pride in my teeth. I started getting cavities a few years ago, which sucked because of how well I treated my teeth. After a few fillings, my dentist noticed that it looked like I'd been grinding my teeth, which caused a lot of damage considering I have freakishly strong jaw muscles.  My best friend is the same way. She takes excellent care of her teeth, never had a cavity, but a few months into her pregnancy, two developed.  Cavities suck, but they're nothing to be embarrassed about if you're taking good care of your teeth. Sometimes it just happens and there's little you can do to prevent it. A dentist won't judge you for one cavity, especially if (s)he sees how well you're taking care of your teeth. P