While it's not like I have anything to use as an example, it is possible to brush your teeth with something other than a toothbrush.
Posted under General
Wouldn't it just be cleaning_teeth if no brush was involved?
Well cleaning_teeth might involve the use of toothpick and dental_floss to clean teeth rather than twigs and toothbrushes.
EDIT.
Also, people brush the twig or plant on the teeth, so technically it would be called brushing their teeth by not using a toothbrush, but like I said there still no pictures that doing that thing.
Updated
post #1050335, if she actually used the brush.