The National Institute of Dental and Craniofacial Research describes gum disease and presents an overview of risks and treatments.

Symptoms, causes, treatment, and prevention.

The American Academy of Periodontology's description of periodontal (gum) diseases, including gingivitis and periodontitis.

Detection, treatment and, prevention of periodontal diseases, from the American Dental Association.

Illustrations, causes, prevention, and treatment, from the National Library of Medicine.

Consumer health resource center providing information on the causes, symptoms, and treatment.

Overview, symptom and treatment information from Oregon Health and Sciences University.

Consumer health resource center providing information on the causes, symptoms, and treatment of gum disease.