I hear professionals use 'caries' when talking professionally, and 'cavities' when talking to layfolk. I've not heard non-professionals use caries much here in

I hear professionals use 'caries' when talking professionally, and 'cavities' when talking to layfolk. I've not heard non-professionals use caries much here in Aus. Mileage may vary, I guess. source: not a dentist, but have had a bunch of dental work done...