US Patent No. 9,474,698 B1; Brittany Luzar of Durango, CO has patented a dental biscuit that cleans the teeth when chewed. The biscuit mixture is comprised of rice flour, white whole wheat flour, wheat starch, sugar, whole grain oat flour, flavor powder, tricalcium phosphate, dicalcium phosphate, natural flavor, mixed tocopherols, zinc sulfate, vitamin E powder, electrolytic iron, annatto extract and fluoride free toothpaste....