Hello,
We need a little more information. What are your symptoms? Typically it is very difficult to remove cemented crowns without having to cut them off, unless a weak cement is used to cement them.
Dr. Michael Mazaheri
It is possible for a crown to be tight. This is caused by the lab made crown being slightly wider than the actual space between the teeth next to the crown space. The tightness should be tested by the Dr on crown insertion. The tightness can be relieved by the Dr...
It is not a good idea to reshape the existing crowns as it is not going to look correct. You will want to consider doing the front six teeth to get proper symmetry and harmony.