question: I have something going on under my very back bottom tooth, it has a small crack in it next to the gum, it is a crown and there was a root canal done  previously. I have taken an antibiotic 2 times over past year  but have yet to do anything with the tooth. I have a hoarseness that doctors can't seem to find a reason for. Could this be it? It has a foul smell but sometimes goes away. I wanted to be able to keep the tooth if possible but if it could be the cause of the hoarseness  it should be pulled, correct?