Periodontal
Additional Resources
Gum Disease InformationThe American Academy of Periodontology's description of periodontal (gum) diseases, including gingivitis and periodontitis.
http://www.perio.org/consumer/2a.html
MayoClinic.com: Gingivitis
Symptoms, causes, treatment, and prevention.
http://www.mayoclinic.com/invoke.cfm?id=DS00363