For the full text of this article, please go to The Journal of the American Dental Association, Volume 140 Issue 12, pages 1456–1464, by clicking on the following link:

Author notes

James D Bader, DDS, MPH, research professor, Department of Operative Dentistry, School of Dentistry, and a senior research fellow, Cecil G Sheps Center for Health Services Research, University of North Carolina, Chapel Hill, NC, USA