摘要
Abstract
Objective:To investigate the relationship between effects of skeletal class Ⅲ malocclusion through maxillary protraction and different skeletal maturation.Method:From January 2010 to April 2013,55 cases of skeletal classⅢmalocclusion were enrolled in our study and separated into 3 groups according to skeletal maturation,18 cases of skeletal maturation classⅠ-Ⅱas A group,20 cases of skeletal maturation classⅢas B group and 17 cases of skeletal maturation class Ⅳas C group.Result:There was a significant difference in the time of maxillary protraction between 3 groups,A,B,C groups were (4.0±0.5),(5.3±0.4) and (8.9±1.0)months(F=250.0,P<0.01).SNA,SNB and A-OLp did not changed before and after treatment in three groups(P>0.05),U1-NA was different among three groups,C group was increased significantly(P<0.01).Compared with before treatment,SNA,ANB,U1-NA and A-OLp changed after treatment (P<0.05 or P<0.01),SNB were different before and after treatment in A and B groups.A group had more obvious change between before and after treatment(P<0.01).Conclusion:The performing of bone age in the treatment of skeletal ClassⅢmalocclusions must be emphasized.关键词
骨性安氏Ⅲ类错/上颌前方牵引/骨龄Key words
Skeletal classⅢmalocclusion/Maxillary protraction/Skeletal maturation分类
医药卫生
