Curious why one of my molars smells bad. I first thought maybe food is getting stuck between the teeth but I floss 3 times a day for that tooth. I notice if i touch the tooth and around the gun line it also smells foul. I've had the tooth inspected various times and had root canals performed due to unrelated pain after needed many filling replacement due to bruxism. I have pretty good oral hygiene so I'm at a loss.