Comparison of temporomandibular joint changes in adolescent Class Ⅱ devision 1 malocclusion patients with mandibular retrusion treated with Twin-block and Class Ⅱ elastics
10.3760/cma.j.issn.1002-0098.2014.07.003
- VernacularTitle:Twin-block和Ⅱ类牵引矫治青少年安氏Ⅱ类1分类错(牙合)下颌后缩患者颞下颌关节的变化
- Author:
Lixiang MAI
1
;
Yu YAO
;
Sheng ZHANG
;
Dawei WANG
;
Zhiguang ZHANG
Author Information
1. 中山大学光华口腔医学院·附属口腔医院正畸科·广东省口腔医学重点实验室
- Keywords:
Malocclusion,Angle Class Ⅱ;
Temporomandibular joint;
Cone-beam computed tomography;
Orthodontics,corrective
- From:
Chinese Journal of Stomatology
2014;49(7):394-398
- CountryChina
- Language:Chinese
-
Abstract:
Objective To compare the temporomandibular joint changes in adolescent Class Ⅱ division 1 malocclusion patients with mandibular retrusion treated with Twin-block and Class Ⅱ elastics.Methods Sixty Class Ⅱ division 1 malocclusion patients with mandibular retrusion were divided into 3 groups (Twin-block group,Class Ⅱ elastic group and control group,20 patients in each group) randomly.Differences of condylar process morphology were compared using cone-beam CT(CBCT) before and after treatment.Results Condylar largest anteroposterior diameter and upper condylar height increased after treatment in both Twin-block groupand Class Ⅱ elastic group.The condylar largest anteroposterior diameter and upper condylar height were longer in both Twin-block group [(8.51 ± 1.48) and (7.39 ± 1.42) mm] and Class Ⅱ elastic group [(8.44± 1.03) and (7.24±0.89) mm] than those in the control group[(7.47± 1.27) and (6.47 ± 1.56) mm] (P＜0.05).No significant difference was found in other measurements (P＞0.05).Conclusions Condylar largest anteroposterior diameter and upper condylar height in Class Ⅱ division 1 malocclusion patients increased after treatment using Twin-block and Class Ⅱ elastics.There was no significant difference between two groups.
