1. Tooth Grows Back: My oldest daughter age 13 now, had a dental cavity at age 7 (the only dental cavity among our six children). We had the cavity drilled out and a filling put in by our local dentist. Two years later, the filling came out and a hole was left in her tooth. Nothing more was done about it except the herbal calcium formula [Calc Tea] that you recommend in your book, School of Natural Healing, made up of: comfrey, horsetail, oatstraw, and lobelia. This combination of herbs has been used very consistently by the entire family over the last two years. We have recently discovered that the hole where the filling was is now completely grown over and is absolutely unnoticeable even under close inspection.