New questions this time ask about periodontitis (PD) and infection with Porphyromonas gingivalis (P. gingivalis) and RA. Periodontitis is inflammation and infection of the ligaments and bones that support the teeth.

Some researchers suspect a role for PD and P. gingivalis in RA risk and progression. Your answers to these new questions will help shed light on a possible relationship between RA and PD, and will also provide some useful context to a separate genetic study looking at the same possibility.