Here as a link to the BBC report on the findings of a new survey that has “discovered” that half of the children in England, Wales and Northern Ireland have got tooth decay. I don’t know why Scotland was excluded but I doubt Scotland’s results would be any better.
http://www.bbc.co.uk/news/health-31960772
“Dr Sandra White, director of dental public health at Public Health England, said it was good news that tooth decay levels were falling and more children were brushing their teeth twice a day, but there was no room for complacency.
Tooth decay is a serious, preventable disease and this survey echoes the need to urgently reduce the amount of sugary snacks and drinks in our children’s diets. Fluoride is indisputable in preventing tooth decay and by brushing teeth using fluoride toothpaste and also introducing water fluoridation where needed, we can significantly improve our children’s dental health.”
Here is the 2012 version of John Yudkin’s classic 1972 book “Pure White and Deadly” that pointed out the need urgently to reduce the amount of sugar in people’s diet to prevent amongst other things, dental caries which, he points out, is a serious but preventable disease.

And here is a picture of Surgeon Captain TL Cleave who in 1966 published the book Diabetes, Coronary Thrombosis, and the Saccharine Disease in which he said this about tooth decay:
“What can, indeed, be achieved by removal of the cause in the case of the dental diseases discussed here is well seen in the two-year study, 1955-7, by G. L. Slack and W. J. Martin, in which schoolchildren were given slices of apple after meals. These children, as long as they were given the slices of apple, not only got significantly less caries than the control children did, but they got much less gum disease, too. To the purely dental result could be added the reduction in potential other disease that follows from the evidence presented in this work. It is into educative channels of this type, plus some subsidization of school tuckshops to sell fruit, nuts, raisins, etc., instead of sweets, that fluoridation costs would seem better directed.”
I particularly like the comment about fluoridation.

Yep, definitely no room for complacency…. I am sure John Yudkin and Surgeon Captain TL Cleave would agree.