My hygienist now uses an ultrasonic scaler instead of the older hand held scraper kind of tools when she cleans our teeth, and she really thinks it’s better for your teeth. It means I’m breathing in the mist the whole time she’s working. It’s cool rather than steamy, but I’m wondering if I’m being exposed to a big dose of mycobacteria anyway. I’m (hopefully) just about to finish my course of the big three and don’t want to have to start over! Anyone have any thoughts or experience that might help?