Background: Evidences suggest that chronic systemic inflammation is associated with increasing mortality in maintenance hemodialysis patients due to atherosclerosis and malnutrition. Periodontal diseases are treatable sources of systemic inflammation in hemodialysis patients. We therefore evaluated the effect of periodontal treatment in maintenance hemodialysis patients.
Method: Periodontal diseases were evaluated in 30 stable maintenance hemodialysis patients by using clinical periodontal status by plaque index (PI) and periodontal disease index (PDI). Hematologic, biochemical, nutritional, and dialysis-related parameters as well as highly sensitive C-reactive protein (hs-CRP), a sensitive systemic inflammatory marker, were analyzed before and after periodontal therapy.
Result: Maintenance hemodialysis patients had high prevalence of periodontal disease (63%). At baseline, hs-CRP positively correlated with clinical periodontal status (PI, r = 0.74, p < 0.001; PDI, r = 0.66, p < 0.001), but negatively correlated with hemoglobin (r = -0.51, p < 0.001), serum albumin (r = -0.61, p = 0.002), and normalized protein catabolic rate (r = -0.42, p = 0.043). After completion of periodontal therapy (duration 6 ± 2 weeks), the PI and PDI significantly declined from 2.13 to 1.48 (p = 0.001) and 3.53 to 2.52 (p = 0.001), respectively, while hs-CRP significantly declined from 3.8 to 0.6 mg/L (p < 0.001). Moreover, erythropoietin dosage could be reduced from 8000 to 6000 unit/week (p = 0.03) after treatment. Pre-dialysis blood urea nitrogen increased from 66.18 to 79.54 mg/dL (p = 0.003) and serum albumin level increased from 3.15 to 3.38 mg/dL (p = 0.003), reflecting improved nutritional status of the patients after periodontal treatment.
Conclusion: Periodontitis is an important source of chronic inflammation. Treatment of periodontal diseases can improve systemic inflammation, nutritional status, and erythropoietin responsiveness in the hemodialysis population.
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