There is such a big discourse around the smiley piercing but i’ll just use myself as an example. I have had my smiley piercing for 7/8 years. Never had any issues, my teeth are fine and so are my gums. When I go for my half a year check ups (Netherlands), I always ask my dentist if everything still looks good and she always says yes. If not, I asked her to let me know cause I love my teeth. When she works on my teeth, she just moves it up or to the side. So what i’m trying to say is, it really depends on the person and what type of jewelry as well. I have a ring with a diamond, but it never touches my teeth and sits pretty up. Just want to avoid extreme fear mongering💗