| ADA: Gum Disease (Periodontal Disease): Detection, treatment and, prevention of periodontal diseases, from the American Dental Association. |
| eMedicine Health - Gingivitis: Consumer health resource center providing information on the causes, symptoms, and treatment. |
| eMedicine Health - Periodontal (Gum) Disease: Consumer health resource center providing information on the causes, symptoms, and treatment of gum disease. |
| Gum Disease Information: The American Academy of Periodontology's description of periodontal (gum) diseases, including gingivitis and periodontitis. |
| Gum Disease Information Bureau: Advice on diagnosis and treatment of gum disease, gingivitis, periodontitis and mouth ulcers. |
| MayoClinic.com: Gingivitis: Symptoms, causes, treatment, and prevention. |
| MEDLINEplus Medical Encyclopedia: Gingivitis: Illustrations, causes, prevention, and treatment, from the National Library of Medicine. |
| NIDCR: Periodontal (Gum) Diseases: The National Institute of Dental and Craniofacial Research describes gum disease and presents an overview of risks and treatments. |
| Periodontal Health - OHSU: Overview, symptom and treatment information from Oregon Health and Sciences University. |
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