Hi:My suggestion is to share your concerns with your dentist in the follow up appointment. There are adjustments that can be made to the existing crowns to make it look more natural.Best,Dr. Maddahi
If you need a root canal it is best to have the root canal done first, then place a crown or porcelain onlay on the tooth!If there is not enough support for the tooth porcelain crown will be placed and of course you will have a temporary crown on your tooth, prior to receiving the final crown...