Author(s)

Yan Hou , Ye Liu , Wensheng Ma and Wenjing Chen

Corresponding Author

Yan Hou

Abstract

Objective To improve crossbite in the skeletal class III cases with the molar mesial movement in the mixed dentition by the modified anterior traction appliance. Methods 20 cases with skeletal class III malocclusion crowded in the posterior arch were selected from the Department of Orthodontics, Hebei Medical University Stomatology Hospital. Through the appliance, the maxilla can be pulled, and crowding of the posterior arch can be solved by molar distalization. X-ray cephalometric measurement and model measurement were performed before and after treatment to compare the changes of bone, teeth and dental arch during the treatment. Results The experimental results showed that the maxillary hypoplasia was improved, the maxillary crowding was relieved and the molar relationship was corrected. Conclusion The modified anterior traction appliance is effective in the treatment of class III malocclusion, which can further improve the development of maxilla. The space lost in the malocclusion is restored, which provides a better basis for the second stage orthodontic treatment. It is a fast and effective orthopedic treatment method, which can reduce the risk of teeth extracted in the second stage.

Keywords

skeletal class III; modified anterior traction appliance; molar distalization