Many people mowadays have to wear false teeth when they are middle-aged. The reason is tooth decay increases a lot . The amount of sugar on our food also increases. Doctors and Dentist now that sugar is the chief cause of tooth decay. Eskimos' teeth, for example, started to decay when they began to eat sweeter food .
Long ago doctors didn't like to treet people's teeth. Barbers and Blacksmiths looked after people's teeth and pulled them out when they decayed . Some people thought toothache was a punishment from the Gods.