Q. I have been suffering from a very bad odur coming from my two crowns for almost 4 years now. Three months ago one came up in a abscess for which root canal treatment was done. This seemed to eradicate the bad odur from that particular crown, however the bad smell still remains in the other. I am sure that there is some kind of infection however after an xray my dentist isnt sure. I am thinking about having a root canal treatment done on the other crown or possibly having both removed and bridged. This has really effected my life. Any suggestions would be welcome, thank you.