• American Academy of Periodontology Offers information on gum disease and treatment and a periodontist referral service.

• California Society of Periodontists News, events, and statewide directory of periodontists.

• Canadian Academy of Periodontology Details gum disease (gingivitis and periodontitis), treatments, and provides a periodontist database.

• Hong Kong Society of Periodontology Includes information about periodontal health and interdisciplinary dentistry.

• Northeastern Society of Periodontists Events and directory of members in Maine, Massachusetts, Vermont, Rhode Island, New Hampshire, Connecticut, New York, New Jersey, Pennsylvania, Maryland, and Delaware.

• Southern Academy of Periodontology Includes an event calendar and directory of post-doctoral periodontal training programs.

• Southwest Society of Periodontists Includes news, officers, events, as well as resources for patients.

• Western Society of Periodontology Includes membership information, meeting schedule, and links.