i got all mine taken out because one went bad, i cracked that shit open biting into a jolly rancher (lol), then food kept getting trapped in there i would use a water flosser to flush it out with salt water, finally it got down into the nerve that shit fucking sucked. it wasn't nearly as bad as people make it out to be but it still sucked pretty bad. bad enough to take a motrin and drink some water, so i guess you could say it was pretty serious