Oral health refers to the condition of the mouth, teeth, gums and oral-facial system. While it affects the ability to eat, speak and smile, it is also closely linked to overall health — a connection that was not always widely understood.
According to the American Dental Association, the idea that oral bacteria could cause disease has been discussed since the late 19th century. During that period, however, dental care largely consisted of extracting teeth to relieve pain, said Melissa Burroughs, senior director of public policy at the CareQuest Institute for Oral Health.