January 2024

Objective: The purpose of this study was to evaluate the impact of orthodontic movement on clinical, microbiological and tomographic parameters in patients with a history of periodontitis. Materials and Methods: Twelve individuals (2 males and 10 females, mean age 42.1 years) who had undergone treatment for generalized chronic periodontitis were selected from the Periodontal Clinic of Guarulhos University (Brazil). The patients undergoing orthodontic treatment were submitted to a clinical examination, and cone beam computed tomography scans were performed at baseline and after 12 months of treatment. Subgingival biofilm samples were analyzed by checkerboard DNA-DNA hybridization. Statistical analysis was performed by a Wilcoxon test. Results: With regard to the periodontal clinical parameters, when comparing baseline and 12-month evaluations, statistically significant reductions were found in Probing Depth and Clinical Attachment Level (CAL). There was a statistically significant increase in relation to the number of sites that had lost CAL. There were no statistically significant tomographic differences, and no loss in the buccal alveolar bone thickness was detected. Conclusions: Considering clinical periodontal parameters, a reduction was observed in the number and percentage of CAL. There was a reduction in A. gerencseriae and an increase in F. nuc. nucleatum, S. constellatus and T. Forsythia species. Regarding the tomographic parameters, no statistically significant differences were observed.