You can make a safe and effective toothpaste using salt, baking soda, and hydrogen peroxide. Mix enough hydrogen peroxide in to make a paste in a small glass jar, use it for a week and dump it and mix another batch. It works.
My second ex taught me this she grew up poor on a farm and they bought very little. She had to have a pacemaker installed when she was 70, the nurse came in and asked for her teeth, she told her that would be tough since they were all her original teeth. She has never had a toothache or had one pulled.