Abstract: Objective · To evaluate the effectiveness of orthodontic intrusion combined with periodontal regenerative surgery in the treatment of pathologic migration of upper incisors. Methods · Nine patients with chronic periodontitis who had pathologic migration of upper incisors were selected. After periodontal initial therapy, periodontal regenerative surgery was performed on the vertical defect around 11 displaced teeth, and then orthodontic intrusion was performed 3 months after the surgery. The differences between baseline (T0) and end of orthodontic treatment (T1) of the periodontal clinical parameters and bone defects were analyzed. Results · For all patients, the periodontal clinical parameters and bone defects were significantly improved. The average pocket probing depth reduction was 2.81 mm, the average attachment gain was 3.38 mm, the average gingival recession was reduced0.56 mm, and the width of keratinized gingival tissue was not decreased. As measured on the X-ray, the depth and width of the vertical bone defect were reducedan average of 2.20 mm and 0.55 mm, respectively. Conclusion · Orthodontic intrusion combined with periodontal regenerative surgery can effectively treat pathologic migration of the upper incisors with vertical bone defects, and obtain good periodontal soft and hard tissue regeneration.

Key words: pathologic tooth migration, vertical bone defect, orthodontic intrusion, periodontal regenerative surgery