I always put a drop of tea tree on my toothbrush along with paste to brush my teeth. sometimes I make a rinse of tt and water to gargle after flossing. I just read a bunch of sites proclaiming the potential dangers ( there are just as many proclaiming safety) but most say not proven safe for pregnant or nursing moms. I've been doing it for so long (and thru pregnancy) that it didn't occur to me to check it out. I feel terrible if it could be a risk. I guess the safe thing to do is discontinue, but I was wondering if anyone else knew better?