A new study has sounded the alarm on the dental health status of people. The report, published in the Journal of Dental Research, says that more than 2.4 billion people across the world have untreated tooth decay, which can lead to severe pain, infection, prolonged absence from work and a troubled childhood, says a BBC report. The alarming thing is that tooth decay is not merely a childhood disease. Even those people who avoid sugary drinks and food can develop tooth decay. Decay occurs when acids in our mouth dissolve the outer layers of teeth. It is also known as dental decay or dental caries. If not treated, it can lead to cavities, gum disease or abscesses, says the news report.

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