No, it's just stupid
The teeth of a file sometimes get clogged - the brush cleans the teeth to keep the file usable
how could they be harmful? they are made to help straighten your teeth.
why do we have diffrent numbers of teeth on a file
It's not all that harmful to your insides, but ice chips teeth pretty effectively, and that can lead to vulnerable spots in the teeth over time.
All you gotta do is just get a nail file and sharpen your teeth i prefer sharpening with a diamond coated nail file, and using the teeth outside your middle teeth =)
It is called 'floating' the horse's teeth.
no it doesn't have any teeth
It must be the RASP file that is used for certain jobs especially in wood carving. The coarse teeth of the rasp file resist clogging.
Yes! Lemonade contains way more sugur and acid then ice tea does. It's one of the most harmful drinks for teeth.
You could, but it would be excruciatingly painful.
to smooth them. they have residue from the glue on the braces and they have to file it off so your not walking around with glue on your teeth.
hydrochloric acid