Will Zoom Whitening Change the Color of Crowns?

The zoom will definitely not whiten the crowns. The zooming isonly good for the virgin teeth, not for composite fillings or crowns

The whitening process acts by oxidizing microscopic particles within the tiny tubules of the tooth.  Crowns and fillings won't tend to change at all.  Many crowns are too bright to begin with, so for some folks, whitening the teeth just makes the crowns blend better.  In my opinion, it is better to have a dark crown than a crown that is too bright.  Bright porcelain really draws attention to itself in a negative way.  Best of luck!