I hardly brush my teeth, maybe three times a week and only with hot water. I see a dentist once a year. My teeth are just fine, very rarely have any cavities (only two in my lifetime), the reason being I do not drink soda and hardly consume any sugar. I am on a strict keto diet. The biggest problems people have with their gums and teeth is too much sugar consumption. Sugar is the number one cause of bad gums and teeth worldwide.