"It has been asserted that a pinch of the Slippery Elm powder put into a hollow tooth stops the ache and greatly delays decay, if used as soon as there is any sign of decay." Grieve, Mrs. M. A Modern Herbal Volume I. Dover. 1971. 285 p
Perhaps combining with goldenseal, Marshmallow root, Oak bark root to make a pie dough consistency and left on over night for 6 nights a week at least may be helpful.
brush teeth only with dr Christopher's tooth powder. Dr Schulze has several products which may be of interest: Tooth and Gum Formula and Oral therapy.
I am a fan of Oregano Oil for taking care of infections of the mouth and strengthening gums