Why can brushing your teeth too hard damage them, but the sharp metal points dentists use to scrape enamel off don’t?

Question

Why can brushing your teeth too hard damage them, but the sharp metal points dentists use to scrape enamel off don’t?

In: Other

Answer 1

The point of a hygienist using their metal is to clean away the plaque build up. This is done once every 6 months/a year(ideally)
A good hygienist will tell you if you don’t need the work done.