I just had a crown redone, I noticed my crown on my front tooth sits above the gum line from the inside, from the outside it's ok.. so basically from the inside the crown is a bit above the natural tooth structure - I have very few natural tooth left, which sits near the gum line. From the outside I see crown, then gumline.. from the inside it goes crown, natural tooth, then gumline... is this normal?? Should I get this crown redone?\n \nAlso I found I'm very sensitive to this crown when I'm tired or sick, is that normal? If I'm healthy, I don't notice the crown as much, but if I'm sick or tired, I sometimes find the crown very uncomfortable? I will be sensitive to one spot where it's not smooth and also the roughness where it connects to the natural tooth. this only happens to this crown on my front top tooth, I also have a crown on my lower front tooth, I don't notice it much at all. what could be causing this? could I have a nerve near the crown or something that gets irritated?? or the root canal needs to be looked at? I had the root canal done like 20 years ago. It could also be just my tongue find the crown irritating and causing me to constantly noticing it.. does anyone else have same issue?