I thought I had a crazy plaque build up, but it was the staining from the tinctures. If you are on herbals consider this.
CatLady please please don't get root canals, watch Root Cause documentary.
From what I understand, tooth decay is caused by nutrition, there is a great book by Ramiel Nagel Cure Tooth Decay, based on dr Weston A Price studying indigenous peoples' with fantastic jaws and teeth diets. In order to maintain (and restore) tooth health we need essential vitamins and minerals from food https://www.westonaprice.org/health-topics/abcs-of-nutrition/characteristics-of-traditional-diets/
Nagel's book is really awesome with many many tips on how to prevent tooth decay.