I saw a "dentist" in the square in Marrakesh once. He was sitting on a blanket and his equipment consisted of a pair of pullers and a bottle of paregoric. He also had an array of old dentures. If you wanted a set of dentures, you sat down and tried them all on until you found a set that fitted as best as they could. I don't think he took insurance but I'm pretty sure you could pay with a chicken or a bag of oranges.