Teeth Whitening With Crowns or Caps
The natural teeth have porous qualities and this is why the teeth get stained as they absorb the staining over a long period of time and this is why the teeth change colour.
With crowns or caps they do not have the same porous values and therefore can they be whitened and the answer is yes and no!
Cosmetic teeth are like tiles in that they be cleaned and polished and that will make them look brighter but the fundermental colour does not change that much. If the crowns have been fitted for some years then the chances are the colour of them will be similar to the natural or normal teeth and therefore after whitening the match should be similar. The whitening gels are not going to hurt the crowns in any way.
Should the natural teeth actually go whiter than the crowns then there is always the option to replace them. Yes this does incur extra cost but with brighter whiter teeth it softens the pain!
Teeth whitening is such a positive thing that it helps with your overall self confidence and can take years off your age.
On Teeth whitening directory there is plenty of information on the best systems and services.