Hard-soft tissue changes with the Twinblock appliance in Class Ⅱ malocclusion patients
10.3969/j.issn.1673-8225.2010.09.012
- VernacularTitle:Twinblock矫治器对颌面部软硬组织生长的改良作用
- Author:
Lijuan CUI
;
Yafei LIU
;
Yanping ZUO
;
Tong Lü
;
Xin LIU
;
Xuecong LIU
;
Wenjing CHEN
- Publication Type:Journal Article
- From:
Chinese Journal of Tissue Engineering Research
2010;14(9):1572-1576
- CountryChina
- Language:Chinese
-
Abstract:
BACKGROUND:Twin block appliance has been shown to effectively promote mandibular bone growth of Class Ⅱ malocclusion patients and improve lateral appearance of mandibular retrusion.The other improvement of Twin block appliance on hard-soft tissues remains unclear.OBJECTIVE:To assess the hard-soft tissue changes following Twinblock appliance treatment.METHODS:Atotal of 48 adolescent patients,30 males and 18 females,aged 11.6 years (range 9.58-12.37) with Class Ⅱ malocclusion were selected from Department of Orthodontics,Affiliated Stomatology Hospital of Hebei Medical University.Of them,27 were treated with Twinblock appliance as the treatment group,and 21 adolescent patients without treatments were selected as the control group.Cephalonetric analysis was used to compare the changes before and after treatment.RESULTS AND CONCLUSLON:Comparative analysis showed that Twinblock could effectively adjust or improve the effect of the natural growth,reduced upper lip convexity and mentolabial furrow angle.Moreover,Twinblock inhibited facial vertical distance reduction and facial convexity increase to decrease the potential differences between maxillary and mandibular bones in sagittal plance.Results show that Twinblock could effectively improve the profile of soft-tissues of Class Ⅱ malocclusion cases,
