Objective To study a population of rheumatoid arthritis patients and determine the extent of periodontal disease in these patients, in orderto investigate the relationship between periodontal disease and rheumatoid arthritis.Methods The experi- mental group was composed of 70 patients with rheumatoid arthritis and the control group consisted of 70 age- and gender-matched individualswithout rheumatoid arthritis. The relationship between periodontal status in rheumatoid arthritis and control groups as well as the relationship between periodontal status and rheumatological findings in patients were analyzed.Results The percent- age of periodontal disease was statistically significant between experimental and control group (P0·05). There were more number of periodontal disease index 5 or 6 in experimental group than in control group (P
