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[–] flope_de 0 points 4 points (+4|-0) ago 

My guess is that it's the, drastically increased, amount of sugar and light carbs in today's diet. Genetic factors, and long term tooth health not being a factor in sexual selection might also be a factor.

"As smoking declines in the population we should see a decline in the prevalence of the disease."

That has been said about a lot of diseases over the last decades. Yet, few of those predictions showed any statistical relevant reduction of cases in relation to the reduction of smokers. Meanwhile some of them have an almost linear relation to other factors. Like the number of coal miners, or worker protection regulations, or environmental protection laws.

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[–] carnold03 0 points 1 points (+1|-0) ago  (edited ago)

Is this because the immigrants settling in the UK have crap oral healthcare or is this because actual ethnic britons have poor oral health.