if people didn't have toothbrushes?

No sugar or processed food....it was good food and organic lol !

Much less sugar in the diet and less eating 24/7. And they had tools like sand gargles.

Before tooth brushes teeth did decay. It was one of the reasons people seldom livedpast 40.

They probably did. Either that or people found some natural way of cleaning teeth.

They oil pulled.

Well sugar wasn't introduced into diets until much later...and there was tooth decay and they would just pull the tooth out

Diet, lack of sugar.