“How do you keep your zirconia teeth white?”

With any crowns, whether porcelain or zirconia or any other material, what you see is, basically, what you got. They might pick up stain, but that can be generally polished off, if need be. Keep them white by brushing your teeth and keeping them clean. And try to avoid things that might stain your own teeth, like a lot of blueberries, cherries, tea and coffee, among other things. If you have any questions, please ask your dentist.

Luckily Zirconia crowns are not able to change shade, porcelain and zirconia materials are not porous enough to take on stain so there is nothing additional you would have to do to maintain the original shade if the crowns. The best piece of advice for getting the most longevity out of the crowns while keeping them looking great is to brush and floss twice daily.