Abstract: Objective To observe the effect of applying osteolysis release and canine rapid movement device in orthodontic treatment of adult extraction. Methods 64 patients with malocclusion treated in our hospital from September 2015 to July 2017 were selected as the subjects. According to the random number table, they were divided into the control group and the study group, 32 cases in each group. The control group was treated with routine orthodontic treatment by exelcymosis, while the study group was treated with orthodontics and canine rapid movement device during orthodontic tooth extraction. The in-place time of the distal movement of the canine teeth, periodontal condition, and root resorption of the canine teeth were observed, and the complications of the two groups were compared. Results In the study group, the in-place time of the distal movement of the canine teeth was significantly shorter than that in the control group. 3 months after treatment, the gingival index (GI), sulcular bleeding index (SBI) and plaque index (PLI) all significantly increased in the two groups (P < 0.05), and there was no significant difference between the study group and the control group (P > 0.05). After the canine teeth were in place, the root resorption volume of the canine teeth in the study group was significantly smaller than that in the control group (P < 0.05); there was no significant difference in the incidence rate of complications between the two groups (P > 0.05). Conclusion In the orthodontic treatment by exelcymosis of adults, the application of osteolysis release and canine rapid movement device in adult tooth extraction can accelerate distal movement of the cuspid and has better safety.

Key words: Malocclusion, Orthodontic treatment by exelcymosis, Compact bone substance lysis, Rapid movement of canine teeth