“Rheumatoid arthritis is a chronic disease affecting over 1.3 million Americans and as much as 1% of the worldwide population.” (www.rheumatoidarthritis.org) There is a growing body of research indicating a causal association between specific periodontal pathogens and rheumatoid arthritis (RA). In a 2009 study, in Compendium of Continuing Education in Dentistry, the authors indicate that a specific perio pathogen, Porphyromonas gingivalis (P.g.), produces an enzyme capable of modifying specifi...