Inflammatory serum markers up to 5 years after comprehensive periodontal therapy of aggressive and chronic periodontitis.

Aim: The aim of the study is to assess the long-term effect of active periodontal therapy on serum inflammatory parameters in patients with aggressive (AgP) and chronic (ChP) periodontitis in a non-randomised clinical study.
Methods: Twenty-five ChP and 17 AgP were examined clinically prior to (baseline), 12 weeks and 60 months after subgingival debridement of all pockets within 2 days. Systemic antibiotics were prescribed if Aggregatibacter actinomycetemcomitans was detected (10 AgP, 8 ChP), flap surgery was rendered if required. Neutrophil elastase (NE), C-reactive protein (CRP), lipopolysaccharide binding protein, interleukin 6, 8, and leukocyte counts were assessed at baseline, 12 weeks and 60 months.
Results: Clinical parameters improved significantly in both groups from 12 weeks to 60 months. Eleven AgP and 18 ChP patients received surgical treatment after the 12 weeks examination. Only 3 patients in each group attended ≥ 2 supportive maintenance visits per year. NE and CRP were significantly higher in AgP than ChP at baseline and 60 months (p < 0.01). For leukocyte counts in ChP, significant changes were observed (baseline: 6.11 ± 1.44 nl ^-1 ; 12 weeks: 5.34 ± 1.40 nl ^-1 ; 60 months: 7.73 ± 2.89 nl ^-1 ; p < 0.05). Multiple regression analysis identified African origin, surgical treatment and female sex to correlate with better clinical improvement.
Conclusion: Despite comprehensive periodontal treatment, AgP patients exhibit higher NE and CRP levels than ChP patients up to 5 years after therapy.
Clinical Relevance: Systemic inflammatory burden in AgP patients is higher than in ChP patients even 5 years after periodontal treatment.