● American Association of Endodontists – national organization representing the specialty of endodontics or root canal treatment.● American Association of Women Dentists – dedicated to enhancing and promoting participation and leadership for women in organized dentistry.● American Dental Association – ADA Online – access to news, publications, and products and services related to dental health.● American Medical Association – another useful site with links to consumer health information, vast AIDS information center, searchable database of more than 650,000 physicians.● EndoWeb – provides the most up-to-date information on endodontic interest.● MedicineNet – Content-rich commercial site includes interactive groups, ask-the-doctor features, medical dictionary, comprehensive drug information, medical news, disease-specific information, and links.● Medscape – Searchable commercial collection of full-text articles from such useful sources as the National Institutes of Health and the Centers for Disease Control and Prevention.● Medical Matrix – Physician maintained a commercial database of annotated health links. Oriented toward medical professionals, but accessible to an educated layperson. A keyword search gets you to a subject index, from which you navigate to the links you want.● WebDental – American based dental database