Hi, I would like to inquire about having root canal treatment on teeth with existing porcelain crowns. I have two teeth that are infected but both of them are crowned. The dentist has suggested to remove the crowns, do the RCT and fit a new crown once complete. How reliable is this treatment and will these two teeth survive for a long time after treatment or is it just best to have them extracted now and look at dental implants in a few months' time?