With medicine (most private practice dentists love the separation between medicine and dentistry and do not want to be included in that umbrella).
I learned this when I overhead the Ceo of Pacific Dental services (non dentist, Steve Thorne, 700-1000? locations) say they were doing all kinda of things to push the connection between the mouth and the rest of the body 4 years ago.

That’s not to say there aren’t some solid studies that show a correlation between gum disease and overall health (the mouth is part of the body so that’s no surprise), I don’t like dentists or especially powerful dental corporations who overly dwell on those studies for their own profit.