http://www.braces.org  
American Association of Orthodontics
Learn more about orthodontists. Includes: news, history, directory, glossary, education and career information, calendar, and regional society information.

http://www.americanboardortho.com
American Board of Orthodontics
Official site of the US certifying board of orthodontics.
Includes: certification standards, how to become board certified in orthodontics, list of diplomates.

http://www.ada.org
American Dental Association
Information for dental professionals and consumers.

http://www.smilemichigan.com
Michigan Dental Association
The official site of the more than 6,500 dentists and dental student members of the Michigan Dental Association.

http://www.loc.gov
The Library of Congress
The nation's oldest federal cultural institution, and it serves as the research arm of Congress.

http://www.nih.gov  
The National Institutes of Health
The world's foremost medical research centers.