Periodontal Mucosal Breaks Trigger RA Disease Activity Periodontal disease (PD) is more common in RA, especially those with anti-citrullinated protein antibodies (ACPAs). RA activity has been linked to the severity of PD and mucosal inflammation. https://t.co/Yx7fPMrB7v https://t.co/pH0XGPqGhJ