According to Louise Tenney, M.H., author of Today's Herbal Health "Elecampane has also been used to treat intestinal worms, edema, digestive problems, skin problems, tooth decay, and gum disorders." She does not say how to use it for teeth/gums, but elecampane is usually drunk as a tea. Further on she writes "It seems to strengthen, cleanse, and tone the mucous membranes of the lungs and stomach." So maybe it effects gums the same way? I have used it for bronchitis. It is totally awesome for bronchitis and pneumonia. BUT... it tastes terrible. When it is cooking on the stove, it smells like cheap incense to me, and it tastes about like it smells. I let it completely cool down to room temperature so I can drink it (correction, gulp it) down quickly as sweeteners (i.e. honey) does absolutely nothing to the flavor. But boy, the results are awesome. A friend's husband had pneumonia, and not responding to antibiotics. He was on the third antibiotic with no response. It took 3 cups of elecampane tea and he was well.