Been there, done that...
http://www.survivalsullivan.com/handle-toothaches-post-collapse/NOT medical advice, just ways to manage tooth pain before you can get to a real dentist.
If there is no chance of getting to a dentist, then this might keep you functional, rather than too distracted to act...
DO evaluate your prepper supplies for a dental kit. There is plenty of information available online about prepper dental equipment and supplies.