What plants (or mixture you can make) in the wild can be used as a toothpaste or tooth cleaner or even as a breath freshener?
There are twigs you can use, as people have said. But a pastethat's a tough one. I'm sure there'd be a good answer but there's nothing I can recall off the cuff.
The Ancient Egyptians used natron (both for cleaning their teeth and for freshening their mouths):
http://en.wikipedia.org/wiki/Natron
You could use baking sodaor common salt (sodium chloride). Salt's certainly obtainable in the wild, particularly if you're near the coast. Anywhere in England that has
-wich in the town name is going to be a place where salt was made in the past.
One response to the question would be to challenge it's premises. Why are these things necessary? If we were living in a wild state, they almost certainly wouldn't be. Nature doesn't blunder, and human beings are, in fact, very finely tuned to their environment. Teeth do their job with no problems and don't rot, if you don't eat crap, as civilized people do. What animal ever used toothpaste?
Everything we're told about dental health gets turned on its head once we begin to look at tooth samples from people living a "wild" existence:
Meantime there appeared a statement from Dr. Adelbert Fernald, Curator of the Museum of Dental School, Harvard University, that he had been collecting mouth casts of living Americans, from the most northerly Eskimos south to the Yucatan. The best teeth and the healthiest mouths were found among people who never drank milk since they had ceased to be suckling babes and who never in their lives tasted any of the other things recommended for sound teeth by the New York Commissioner of Health. These people, Eskimos, never use tooth paste, tooth powder, tooth brushes, mouth wash, or gargle. They never take any pains to cleanse their teeth or mouths. They do not visit their dentist twice a year or even once in a lifetime.
Australian Aborigines, when eating their traditional foods, also had virtually zero dental decay. The same goes for North American Indians. One name the Indians had for whites, besides "palefaces", was "blackteeth". They believed bizarrely that white people's teeth rotted because of the lies that passed over them! (Or perhaps not so bizarrely when you read about all the broken treaties.)
Anyway, i's refined carbohydrates that do itsugar and white flour principally. There are competing theories about why that is. The popular one is that some of the sugars from these foods stay on the teeth and feed bacteria. The less well-known, but in truth more plausible, one is that these nutrient-denuded foods supply insufficient minerals and vitamins so you must draw on your body's reserves of minerals and these literally get pulled from the teeth. The body protects internal organs and draws first on the teeth and bones
Rami Nagel, among others, has written about it:
http://www.amazon.co.uk/Cure-Tooth-Decay-Cavities-Nutrition/dp/B004GB0JIM/
Short review of his book here:
http://nourishedmagazine.com.au/blo...-heal-your-cavities-and-prevent-root-canals-2
So a kind of answer to the question is that people who ate wild foods didn't really need toothpaste. A rinse with water and perhaps a going over with a suitable twig would be adequate.