Periodontal and hematological characteristics associated with aggressive periodontitis, juvenile idiopathic arthritis, and rheumatoid arthritis

Background: Periodontitis shares several clinical and pathogenic characteristics with chronic arthritis, and there is some degree of coexistence. The aims of this study were to elucidate whether patients with localized aggressive periodontitis (LAgP), generalized aggressive periodontitis (GAgP), juvenile idiopathic arthritis (JIA), and rheumatoid arthritis (RA) share periodontal and hematological characteristics distinguishing them from individuals free of diseases. Methods: The study population consisted of white adults (<= 35 years old) with LAgP (N = 18), GAgP (N = 27), JIA (N = 10), RA (N = 23), and healthy controls (N = 25). All individuals underwent a standardized interview, blood sampling, and an intraoral examination, including registration of plaque, bleeding on probing, probing depth (PD), clinical attachment loss (CAL), and alveolar bone loss (ABL) on radiographs. Blood samples were analyzed for erythrocyte fraction, leukocytes and differential counts, erythrocyte sedimentation rate, C-reactive protein (CRP), immunoglobulin (Ig) M and IgA rheumatoid factors (RFs), and antibodies to cyclic citrullinated peptides. Results: RA patients had a higher percentage of sites with PD >= 4 mm, CAL >= 2 mm, and ABL >= 2 mm compared to controls. The percentage of sites with CAL >= 2 mm significantly correlated with the levels of IgM-RF and IgA-RF. Missing teeth in JIA and RA patients were not lost due to periodontitis. Patients with GAgP showed higher levels of leukocytes, including neutrophils, and CRP compared to controls. In part, JIA and RA patients showed similar results. Conclusions: Young adults with RA may develop periodontal destruction, and these patients require professional attention. Both differences and similarities in periodontal and hernatological variables were seen in individuals with periodontitis, JIA, and RA.