Depends. I had 4 at 90°. Only one hurt a little. They caused pockets, which are hard to clean (impossible by yourself) and can accelerate bone loss. I removed 3 of them. 2 by a jaw surgeon. They were creating a space bewteen molars deeper inside the bone, while also creating an opening at the top. Nasty.

Chronic inflamation of the gums don’t hurt either. Best way to tell is by a mouth hygiënist. If your gums bleed easily while flossing, it’s a good idea to keep flossing. Takes about 1-2 weeks before the gums calm down and the swelling dissipates. I use those tiny round brushes to get in between. If you start using those, m start with the thinnest wire. The metal should absolutely not scrape against the teeth, only the brush.

Taken years to form that habit…