My problem with "bamboo" toothbrushes is that 99% of them have bristles that are still made out of plastic which then disintigrates in your mouth as you brush.

My problem with "bamboo" toothbrushes is that 99% of them have bristles that are still made out of plastic which then disintigrates in your mouth as you brush. You can get boar bristled bamboo brushes, though they don't clean as good if you are using a regular (non-electric) toothbrush. Or, we could just not eat that much carbs and have perfect teeth as many ancenstors pre-agricultural revolution had who ate the correct diet and they didn't even need toothbrushes.