Whitening my front 6 Crowns, how do labs accomplish this on something that is supposed to be color stable?

i just went to the dentist today to put on 6 crowns on front teeth. My dentist used temporary cement and said he can send them back the crowns for all types of adjustments, including making them a shade or 2 whiter if i desire. I am thinking about doing this, but it doesn't make sense to me that a crown can go to a lab and come back whiter, how do the labs accomplish this on something that is supposed to be color stable?

Doctor Answers 2

Dental crowns

Normally the lab would remove the surface layer of the porcelain and replace it with a lighter shade porcelain. This is an easy and common lab procedure. 

Whitening Crowns

That's a great question. The only way to whiten already made crowns is to remove porcelain from the crowns and replace it with a lighter shade of porcelain. There is no magic crown whitening formula. 

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