> When I started working at Amazon in 2014 I had a number of coworkers from India and Taiwan whose dentists had convinced them that they needed professional tee

> When I started working at Amazon in 2014 I had a number of coworkers from India and Taiwan whose dentists had convinced them that they needed professional teeth cleanings every 3 months. I have a friend from China whose dentist convinced him to do that. On the other hand, he'd never been to a dentist in his life until he came to the US, and there was something about deep gum pockets.