06/24/2026
Dysbiosis-Mediated Inflammation: A Pathophysiological Link Between Rheumatoid Arthritis and Periodontitis
Association between periodontitis and rheumatoid arthritis is long established, but which comes first has long been debated by scientists. The aim of this study was to explore mechanistic links between rheumatoid arthritis (RA) and periodontitis (PD) through the lens of subgingival microbial dysbiosis–mediated inflammation.
Researchers have uncovered compelling evidence of a two-way relationship between rheumatoid arthritis (RA) and periodontitis (gum disease), showing that treating gum disease can significantly reduce inflammation and improve RA symptoms for patients. The study, published in the Journal of Clinical Periodontology, examined how microbial imbalances in the mouth – known as dysbiosis – contribute to systemic inflammation in RA patients.
The study also evaluated the impact of intensive non-surgical periodontal therapy – professional prophylaxis combined with oral hygiene coaching – compared to oral hygiene advice alone: periodontal treatment reduced gingival inflammation and restored balance between oral bacteria and the immune system; levels of inflammatory cytokines in gingival crevicular fluid dropped significantly after treatment; circulating antibodies to oral bacteria decreased, and RA clinical scores improved, including reductions in joint tenderness and disease activity;
network analysis showed that therapy “re-wired” immune–microbial interactions, strengthening the body’s ability to control harmful bacteria.
Aim To explore mechanistic links between rheumatoid arthritis (RA) and periodontitis (PD) through the lens of subgingival microbial dysbiosis–mediated inflammation. Methods Subgingival plaque from...
