ok if you want a lot of flex
This is non metal (i.e. plastic).  The tips are curved well but are kind of wide (they don't come to a point) and they flex a lot.  It takes very little pressure to get them to flex and as far as using this to scrape your teeth... well you would get almost no scraping.  This would be great for introducing kids to what the dentist does or for people with super sensitive gums.  I did give 4 stars as it it a good tool for removing paint from delicate surfaces and it is non marring.  Handle is comfortable to hold and I actually use this when clean my air guns as the chambers are small and tight and this won't cause damage and can get into the tight spaces.
Rating: 4 stars