Well. I have stains on my two front teeth because they came in that way. Over the years, I've switched dentists twice, today I met with dentist #3 for the first time. Dentist #1 told me, at age 12, that bleaching would do nothing and they'd figure out how to fix my teeth when I got older. Dentist #2, at age 16, told me I needed crowns, thousands of dollars of dental work, and they couldn't be done until I was 18 or 19. Today, dentist #3 tells me they have an in-office bleaching thing that takes about half an hour to 45 minutes and that should do the trick. So I'm glad I can have them taken care of next week, but BLARGHAFECKLEPITCH why couldn't one of the other dentists have done that?