I went to a dentist in Manhattan after moving to the city. Googled a good dentist in my area (UES) and just went. I got there and he wanted $20k to replace all my teeth with veneers. "Wow, we gotta get this all out", were his words.

I've never had a single cavity or needed braces. I happen to be blessed with very good teeth. I told him to fuck off (unfortunately not in so many words) and never went back.

That was 10 years ago. Still no cavity or any issues at all.