摘要
目的 观察联合应用前方牵引和上颌快速扩弓治疗 10～ 14岁骨性安氏Ⅲ类错牙合患者的临床效果。方法 以 11例 10～ 14岁骨性Ⅲ类错牙合患者为观察组 ,3 2例替牙早期骨性Ⅲ类错牙合患者为对照组。两组均采用联合应用前方牵引和上颌快速扩弓装置治疗 ,平均治疗时间 6个月。治疗前后均拍摄头影侧位片 ,并采用一种新的头颅参照系统 ,对结果进行分析比较 ,评价治疗效果。结果 两组患者均发生上颌骨前移 ,下颌骨向下后旋转 ,向前生长受限。观察组前牙覆盖增加 5 .3mm ,骨性变化占 5 1% ,牙性变化占 4 9% ;其中 ,9例患者前牙达到正常覆牙合、覆盖关系 ,磨牙中性关系 ,2例患者前牙达到浅覆牙合、浅覆盖关系 ,后牙中性偏近中关系。结论 联合应用前方牵引和上颌快速扩弓治疗 10～ 14岁轻中度骨性反牙合患者有较好疗效 ,可减轻畸形程度 ,避免手术治疗 。
Objective The aim of this study is to investigate the clinical effects of combined protraction facemask and rapid maxillary expansion in the treatment of Class Ⅲ malocclusion in 11 children aged from 10 to 14 years.Methods The observation group included 11 subjects in late mixed dentition or early permanent dentition,and the control group included 32 subjects in early mixed dentition. Protraction facemask and rapid maxillary expansion device was used and the mean treatment time was 6 months. Cephalometric radiographs were taken at the initiation of treatment (T1) and after 6 months of treatment(T2).In this way,(T2 T1) represented cephalometric changes after the treantment and cephalometric analysis based on a new basecranical reference system was used to compare the changes.Results All the subjects had the following changes: the maxilla moved forward, the mandible exhibited a downward and backward rotation and the forward growth was restricted. The overjet correction of the observation group was 5.3mm, 51% of the overjet correction was due to skeletal changes and 49% due to dental changes.9 cases obtained normal overjet and overbite and molar relationship. Conclusion The combination of protraction facemask and rapid maxillary expansion is helpful to the correction of Class Ⅲ malocclusion in children aged from 10 to 14 years.It can alleviate the degree of deformation,avoid surgery, and improve the relationship between hard and soft tissue.
出处
《上海口腔医学》
CAS
CSCD
2002年第1期2-4,共3页
Shanghai Journal of Stomatology
