摘要
Abstract
Objective To investigate the therapeutic effects of early intervention with a maxillary protraction appliance on children with Angle Class III malocclusion and maxillary hypoplasia.Methods A total of 116 children with Angle Class Ⅲmalocclusion and maxillary hypoplasia treated in the author's hospital from January 2020 to September 2022 were selected as subjects.All patients underwent intervention with a maxillary protraction appliance.Differences in hard tissue,soft tissue,dental indicators,and dental arch width were measured before and after treatment,and the correction efficacy was calculated.Results After treatment,the SNA,ANB,SN-MP,Y-axis angle,and NA-PA of the patient were all higher than before treatment(P＜0.05),while SNB,NP-FH were all lower than before treatment(P＜0.05).After treatment,the levels of L1-MP,U1-SN,and U1-NA in the children were lower than before treatment,while L1-NB was higher than before treatment(P＜0.05).The width of the anterior,middle,and posterior segments of the dental arch after treatment was longer than before treatment(P＜0.05).The effective correction rate was 93.97%(109/116).Conclusion Early intervention with a maxillary protraction appliance in children with Angle Class III malocclusion and maxillary hypoplasia significantly promotes maxillary development,improves hard/soft tissue and dental indicators,and demonstrates effective arch expansion.关键词
上颌前方牵引器/上颌骨发育不足/安氏Ⅲ类错(牙合)/早期干预/牙性指标Key words
maxillary protractor/maxilla hypoplasia/An's Class Ⅲ malocclusion/early intervention/dental index分类
医药卫生
