It cleans its teeth
they strengthen your teeth and cleans them
The birds eat food bits out of there teeth and this cleans them, this is how they got there name.
well, it cleans your teeth for a start.... ;-)
the side
Dissolves dirty stuck on teeth and cleans teeth
Crest
a plover cleans a crocodile's teeth.
Egrets and Oxpickers.
they get birds to clean there teeth and skin
The teeth of a file sometimes get clogged - the brush cleans the teeth to keep the file usable
Flossing cleans any food particles stuck between teeth. If those food particles are not cleaned, they will cause cavity between teeth and also cause your gum and bone to go away leading to gum disease.