A new study suggests that we still don’t know what causes tooth decay.
The research published in the journal Nature Medicine has found that the disease can be caused by a combination of factors.
Researchers at the University of Exeter in the UK used a tooth chart to determine the prevalence of different tooth decay stages in the human population.
They looked at the data from nearly 300,000 individuals who had undergone an extraction procedure, as well as a cohort of 5,000 healthy volunteers who had their teeth extracted in another way.
The researchers found that, in general, tooth decay was more prevalent in the older age groups.
But they also found that some of the older people had significantly lower levels of the disease.
The team found that one of the biggest risk factors for tooth decay in older people was tooth loss.
These were usually caused by cavities, and it was suggested that dental health could be improved by using fluoride toothpaste.
The team concluded that there are several potential mechanisms for the tooth decay and the authors say they have no reason to doubt this.
More from BBC Science: What are the chances of a child dying of cancer?
The BBC’s science correspondent, Dan Sheridan, explains why it is important for parents to have a realistic view of their child’s health and wellbeing.
He says that children who are born with cancer can have their cancer removed in infancy and this is a good way of getting the disease under control.
He says this is an important message for parents who want to protect their children from the disease, but that the real threat comes when the disease reaches a certain stage.
He adds that there is a risk of the cancer developing into other malignant tumours.
However, he says that a good understanding of the causes of tooth decay will be vital in the fight against this deadly disease.