[Winniesboy]

The title refers to “the myth” and the entire article debunks the idea that it is in any way a myth—saying only that it is improving.

Actually it doesn't. Look at the comparative UK/US dental health figures towards the end of the article. What it does make clear, however, is that on the whole the British are less concerned than Americans about cosmetic dentisry, as distinct from dental health.

[9YearLurker]

But the non-myth myth has to do with yellow and crooked and otherwise unsightly teeth—not the number of cavities filled.