I recently came across a remedy called "Oil pulling" on the resourceful earthclinic.com. If you haven't visited this site then this is a must. I've often found useful home remedies (what this site likes to call "Folk remedies") for some of the most common health problems ranging from tooth-aches to loose motions. Oil pulling has been a part of the Indian traditional medicinal system - Ayurveda. Although, I am not sure if it has been known by the same name ;-)
I haven't tried this out myself, but intend to. If you have, let me know your experience.