They had a low-fear population, where they basically gave them a 13-minute presentation, all based in science, but told them that, if you didn't brush and floss your teeth, you could get gum disease. If you get gum disease, you will lose your teeth, but you'll get dentures, and it won't be that bad.
Tenían la población de poco miedo, a la que basicamente le dieron una presentación de 13 minutos, todo basado en la ciencia, pero les dijeron que, si no se cepillaban lo dientes, les podría dar gingivitis. Si te da gingivitis, perderían sus dientes, pero les pondrán dentaduras, y no será tan malo.