An efficacy comparison between pre-adjusted and Begg appliance on the dentofacial morphology in Angle class Ⅱ division 1 extraction cases treated by light archwire technique

VernacularTitle:细丝弓技术矫治安氏Ⅱ类1分类拔牙患者在两种矫治器中的疗效比较
Author: Guoyong LI ; Bin CAI ; Xiaoqiu ZHOU ; Jin ZHANG ; Haitao LIU ; Zhili ZHANG
Keywords: Light archwire technique; Appliance; Class Ⅱ malocclusion
From: Journal of Practical Stomatology 2016;32(5):678-681
CountryChina
Language:Chinese
Abstract: Objective:To compare the effects between Begg and pre-adjusted appliance on dentofacial morphology in Angle class Ⅱ division 1 extraction cases treated by light archwire technique.Methods:28 cases with Angle class Ⅱ division 1 who needed maximum maxillary incisor retraction were divided into 2 groups (MBT pre-adjusted and Begg group) and treated by light archwire technique.4 first premolars were extracted in all patients.Lateral cephalometric films were analyzed before and after treatment.Results:The upper incisors were intruded (0.18 ± 0.32)mm and (0.77 ± 0.91) mm in pre-adjusted and Begg group respectively (P ＜ 0.05).The other differences of cephalometric analyses between 2 groups were not significant (P ＞ 0.05).Conclusion:The effects were almost same with pre-adjusted and Begg appliances in Angle class Ⅱ division 1 extraction cases treated by light archwire technique except for that the latter is better than the former in vertical control of maxillary anterior teeth.