The study consist of three groups: periodontally healthy individuals (group 1; n = 20), individuals with generalized chronic periodontitis (group 2; n = 20), the same patients with chronic periodontitis after they had been treated with scaling and root planing (SRP) were considered as Group 3. Clinical measurements were recorded; GCF and serum samples were obtained from each participant before and 6 weeks after therapy. Endocan, VEGF-A and TNF-α levels were measured by enzyme-linked immunosorbent assay.