Abstract: Objective: To explore the clinical effects of orthodontic-periodontal treatment on gums in the molar area of adult periodontal patients, through the observation and analysis of periodontal status and gingival appearance index of molar. Methods: 24 patients with moderate or severe periodontal disease from our Department were included and treated with adequate periodontal support therapy. After periodontal inflammation was controlled, orthodontic treatment was performed by an experienced oral doctor. The plaque index (PLI), bleed on probing (BOP), modified bleeding index (BI), papilla presence index (PPI), probing depth (PD), and clinical attachment loss were compared before and after treatment. Results: 24 patients with moderate and severe periodontitis had significant improvement in oral plaque index (PLI), probe hemorrhage (BOP), bleeding index (BI), molar profile index (PPI) of the gum area and probing depth of periodontal pocket (PD) (P<0.05). The health condition of gums was significantly improved after treatment. Conclusion: After orthodontic combined with periodontal treatment, the deformity of the tooth was corrected, the occlusal relationship was rebuilt, and the gingival state of the molar area was improved, which is beneficial to the control of plaque and oral hygiene. So orthodontic accompanied with periodontal treatment is worthy of clinical application as a treatment option for patients with moderate to severe periodontal disease.

Key words: Orthodontic accompanied with periodontal treatment, Periodontitis, Gingival health, Molar area