Here are some links you may find of interest:

The American Dental Association - www.ada.org
Academy Of General Dentistry - www.agd.org
American Academy Of  Periodontology - www.perio.org
The American Dental Hygienists’ Association - www.adha.org
The Oral Cancer Foundation - www.oralcancerfoundation.org
Strauman Dental Implants - www.straumann.com