Baking soda, salt, and food grade hydrogen peroxide make and excellent toothpaste. Store in a diced pimientos 4 oz. jar. All 5 of my teeth are pearly white. At family reunions my relatives think I am getting uppity.
My grandparents Sicilian immigrants brushed their teeth with baking soda after each meal. They rarely ate between meals. They each died in their early 90s with most of their teeth in place.