Research of treatment effects of double parabolic lingual springs appliance and open vertical loops in combination with straight wire appliance therapy on skeletal class Ⅲ malocclusion in early permanent dentition

VernacularTitle:舌簧活动矫治器和垂直开大曲联合直丝弓矫治器治疗恒牙早期骨性Ⅲ错合的疗效评价
Author: Zhongfu CHANG
Publication Type:Journal Article
Keywords: Tooth abnormalities; Orthodontic appliances; Orthotic devices
From: Chinese Journal of Primary Medicine and Pharmacy 2015;22(2):250-252
CountryChina
Language:Chinese
Abstract: Objective To evaluate the treatment effects of double parabolic lingual springs appliance and open vertical loops in combination with straight wire appliance therapy on skeletal class Ⅲ malocclusion in early permanent dentition.Methods 30 cases with skeletal class Ⅲ malocclusion in early permanent dentition were treated by double parabolic lingual springs appliance and open vertical loops in combination with straight wire appliance.Cephalometric tracing measurement was taken to analyze and compare between pretreatment and posttreatment.Results The comparison of before and after orthodontic treatment showed angle SNA increased (3.20 ± 0.36) °,angle SNB decreased (-0.39 ± 0.48) °,angle ANB decreased (4.69 ± 1.34) °,Ls-E increased (3.50 ± 1.14) mm (t=-4.65,2.73,-8.42,-4.32,all P＜0.01).Conclusion The above metioned technique could be a reliable way to treat mild and moderate skeletal class Ⅲ malocclusion.