Other than the Additional Tip: "use the toothpaste with Fluoride" (which I don't believe in. too much controversy about the type of Fluoride being used in tooth products), I find lots of solutions in this post for supporting healing cavities naturally.
Use Coconut Oil - Homemade Coconut Oil Toothpaste - Modern Hippie Housewife More - 9 Reasons to Use Coconut Oil Daily Coconut Oil Will Set You Free — and Improve Your Health!Coconut Oil Fuels Your Metabolism!
Diy Coconut oil toothpaste Prepare & clean a small jar with tight lid. Mix 1 part Coconut Oil w/ 1 part Baking Soda. Add drops of food-grade essential oils to flavor to your taste. Allow your paste to cool and set.