I take a small traveling toothbrush (the brush part stores in the handle), a cut length of floss for each day and a few threaders (I have two fixed bridges). (If I don't cut the floss ahead of time I tend to skip flossing rather than fussing with my knife by headlamp light.) I use baking soda out in the woods--it doesn't leave white spots on the ground like toothpaste, is recommended by my dentist and has lots of other uses (paste for insect bites, deodorant powder). Lighter and cheaper than toothpaste. It is important to be able to reach your back teeth effectively (argument against the fingertip brush or cutting most of your toothbrush handle off) and to maintain good dental hygiene on the trail. The money you save on dentistry will be your own!