Effect of combined periodontal-orthodontic treatment on NOD-like receptor protein 3 and high mobility group box-1 expressions in patients with periodontitis and its clinical significance.

To investigate the effect of combined periodontal-orthodontic treatment on the gingival crevicular fluid (GCF) levels of high mobility group box-1 (HMGB1) and NOD-like receptor protein 3 (NLRP3) in chronic periodontitis.A total of 60 patients with periodontitis who received combined periodontal-orthodontic treatment and 32 healthy individuals as normal controls were recruited in this study. Periodontal parameters were recorded. Enzyme-linked immunosorbent assay (ELISA) was used to examine GCF levels of HMGB1 and NLRP3.The periodontal parameters and GCF levels of HMGB1 and NLRP3 in periodontitis patients were significantly higher before treatment, and observably decreased after 6 months of treatment as compared with the healthy group. However, significant positive correlations were observed between HMGB1, NLRP3, and periodontal parameters in chronic periodontitis patients.Patients with chronic periodontitis showed higher levels of HMGB1 and NLRP3 in GCF.