If we are to have a chance of rebuilding civilisation after the coming Great Collapse, the remnant will need to get as healthy as possible. A time of great deprivation is coming, and there may not be a lot of dentists on the ground. Teeth problems can be the bane of one’s life, and extraction with a pair of rusty pliers is not something that one would want to do. Dental hygiene is the most important prepping skill. That is to not even consider cognitive health issues and dental care: