
“The Impact of Oral Health on the Academic Performance of Disadvantaged Children,” appearing in the September 2012 issue of the American Journal of Public Health, examined nearly 1500 socioeconomically disadvantaged elementary and high school children in the Los Angeles Unified School District, matching their oral health status to their academic achievement and attendance records.
http://dentistry.usc.edu/2012/08/10/poor-oral-health-can-mean-missed-school-lower-grades/