Teeth: American white v. British yellow

But what is it about the bright white and perfectly straight teeth of Los Angeles that Americans love - and expect of their public figures?
"Americans have the idea uniformity is equivalent to looking good. The British character is more free-spirited, more radical," says Professor Liz Kay, dean of the Peninsula Dental School in Exeter and Plymouth.
She says Americans aspire to a row of teeth which are absolutely even and white. BBC News