I recently visited my dentist due to pain my second molar. The tooth has a full crown with a plug, and xrays show an infection in the root. Also swelling has pushed the tooth up and it is loose. I was sent to an endodontic specialist who told me the tooth was fractured above the gum line and needs a root canal. My question is, how can the fracture be above the gum line if there is only a crown there? Isn't it possible for the fracture to only be below the gum line, in which case the only treatment is extraction? The crown is metal and porclean, and is only 3 years old, and I don't think the crown itself could fracture, could it? The endodontist made it sound like it was my own tooth that was fractured. I don't even remember biting down on anything hard or anything that caused pain.