Preliminary investigation of orthodontic treatment in compliance with dentofacial development in patients with skeletal Class Ⅲ malocclusion and open bite

VernacularTitle:替牙期骨性Ⅲ类错(牙合)伴开(牙合)的正畸方法初探
Author: Yue XU ¹ ; Bin CAI ; Xi-Hua LU
Author Information

1. 中山大学光华口腔医学院附属口腔医院
Keywords: Orthodontics; corrective; Malocclusion; Angle Class Ⅲ; Orthopedic treatment
From: Chinese Journal of Stomatology 2009;44(10):594-597
CountryChina
Language:Chinese
Abstract: Objective To analyze the biologic principle of orthodontic treatment in patients with skeletal Class Ⅲ malocclusion and open bite.Methods Eleven pre-adolescent patients with severe skeletal Class Ⅲ malocclusion and open bite(age range 7-9 years old,mean age 8.3±0.8)were included.All patients were surgical cases but the patients rejected surgery.The theatment methods used were face mask,rapid maxillary expansion occlusal splint and fixed appliance.Lateral cephalometric films were taken before and after treatment.Cephalometric analysis was performed.Results After the treatment SNA changed from (79.0±1.2)°to(81.9±0.8)°(P＜0.01).And the inclination of lower incisors was decreased from (25.6±2.1)°to(20.1±1.4)°when measured to the NB line(P＜0.01).The direction of the facial growth was maintained.Conclusions Good orthodontic results could be achieved in patients with skeletal Class Ⅲ malocclusion and open bite.