brushing teeth and flossing
a long time ago before the invention of sweets and baked goods, we humans did not have many teeth problems. how many squirrels do you see at the dentist? none? then why should we humans be any different? only because we altered our diet from what we were designed to eat.
starchy and sugary carbohydrates are your main cause of teeth problems. if you ate raw veggies and meat then you would not have to worry about your teeth. ancient people that are dug up today have nice teeth and so could we but we trade-off healthy teeth for starchy and sugary foods which are calorie dense, inexpensive, and tasty.
to combat this assault on our teeth we need to brush off the particles of sugar and starch that stick to our teeth or else they will be used as a food source for bacteria which emits an acid end-product which causes holes in our teeth. flossing is also used to get between the teeth where a standard toothbrush can't reach. we must brush and floss right after we eat because the bacteria goes to work quickly to eat away the sugars in our mouth and produce acid.