The Brits have better average tooth health than Americans. They don't go for orthodontia as frequently, but in terms of cavities and missing teeth, they do better.

This is largely explained by economic differences in the US. The poor have awful tooth health; the wealthy have very good tooth health. In the UK, the poor and wealthy are closer to the median.

https://www.cnn.com/2015/12/17/health/british-american-bad-t...