| | Crown problems
About 11 years ago I had two root canals and a double crown put on two of my back, lower right molars. Although I have been going to the dentist every 6 months for checkups, now he says there is decay present on the forward base tooth, and the crown on the back tooth has a gap under it and is no longer sealed properly. My question is how long should crowns last, and has anyone had a similar problem where it could be fixed, without taking off the old crowns and having to pay for two new ones? Did anyone's dentist advise them that even if a tooth has had a root canal it still needs to be taken care of like a healthy tooth because it can still decay?