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People have more gum disease today than they did 2,000 years ago. Researchers from London's King's College looked at the skulls of 303 people who lived over 2,000 years ago. The researchers said only 5 per cent of the skulls had gum disease. Up to 30 per cent of people have gum disease today. A professor was surprised because 2,000 years ago, people did not have toothbrushes or toothpaste. They also did not have dentists.

Smoking is the biggest reason for gum disease today. Oral health has become worse. A researcher said gum disease could start going down if people stop smoking. Gum disease is because bacteria build up in your mouth. The bacteria attack your gums. This can make your teeth fall out. People can lower the risk of gum disease if they brush their teeth more often. They should also use mouthwash and stop smoking.