Should I have my crowned molar tooth extracted or is it worth saving?

You should not have to pay anything to have the crown adjusted. It's a very quick and simple procedure. A little bit of the crown material will be removed with the drill until the bite is right.

After root canal there is no more blood supply to the tooth, your tooth changes color. You have placed a crown over the root cal tooth, in the beginning, you probably did not see that, but now due to recession of your gum, the color is obvious. It is best to see your dentist to check the tooth...

I think your best option would be to have that crown replaced. It shouldn’t be possible to remove it as you describe. If there is a crack there, it can and probably will decay. The metal in the crown will make it difficult to see decay on an x-ray. The first symptom will likely be pain, but at t...

It is certainly possible to put a crown on a wisdom tooth. If there is enough solid tooth structure and the tooth is in an appropriate position, it shouldn’t be a problem.

It is possible that the crown was not properly cemented or may have an air bubble. My recommendation is to go see a dentist before the situation gets worst or you end up losing the crown. 

Based on my experience, darkening around a porcelain crown is  more likely to be present whenever metal is used as a substructure for the crown ( PFM or porcelain fused to metal / gold crowns).   PFM crowns have an opaque “non-precious metal” , “semi-precious metal” or “high n...