II. Pathophysiology
III. Risk Factors
- Dental Caries
 - Poor Dental Hygiene
 - Older patients with comorbid illness
 - Tobacco Abuse
 - Immunosuppression
 - Exposure to Saliva of a patient with Periodontal Disease
 
IV. Types
- 
                          Gingivitis
                          
- Inflammation of gums (swelling, erythema) that bleed more easily
 - Periodontal Disease typically starts with Gingivitis
 
 - 
                          Periodontitis
                          
- Inflammation spreads to the periodontal ligament and alveolar bone
 
 - 
                          Pericoronitis
                          
- Localized infection within Gingival flap as tooth erupts (e.g. impacted wisdom tooth)
 
 
V. Complications
- Fever of Unknown Origin
 - Bacterial Endocarditis
 - May be related to pathogenesis of atherosclerosis and other vascular disease
 
VI. Prevention
- See Gingivitis