I am 26 years old and have had a silver crown fitted to my second from back upper tooth. I was told you would not see when I smiled but you can see it when I smile and I’m unhappy with the way it looks. As I only had It this week, could I just pay the difference approx another £200 more to change to a white crown or would I need to start from scratch and pay much more money around an additional £400 to the £200 I have already spend? Thank you and I look forward to hearing from you shortly