Poor teeth are often one of the key signs of neglect in children. And yes we make immediate judgements and assumptions based on someone's teeth.

You are right that it is not easy to maintain good teeth health in the UK; the NHS does the bare minimum. But at least you can get the bare minimum and children get their teeth cared for at least until they are 18.

Teeth are even more important than hair (I've got a thing about hair, in case you hadn't noticed).