应用不调指数评价替牙期错[牙合]畸形早期矫治的研究  

Evaluation of early orthodontic treatment outcomes of malocclusions in mixed dentition using discrepancy index

作　　者：吴滢倩 阮文华[1] WU Ying-qian;RUAN Wen-hua(The Children’s Hospital,Department of Stomatology,Zhejiang University School of Medicine,National Clinical Research Center for Child Health,Zhejiang Hangzhou 310052,China)

机构地区：[1]浙江大学医学院附属儿童医院口腔科,国家儿童健康与疾病临床医学研究中心,浙江杭州310052

出　　处：《临床口腔医学杂志》2021年第12期753-756,共4页Journal of Clinical Stomatology

摘　　要：目的:应用不调指数(discrepancy index,DI)定量评价替牙期错[牙合]畸形早期矫治效果。方法:回顾2015年3月~2019年5月在浙江大学医学院附属儿童医院口腔科就诊并诊断为替牙期错[牙合]畸形的患儿32例,同时收集其初诊及正畸结束时的口腔模型、曲面断层片、头颅侧位片行DI指数分析。结果:正畸后的平均DI指数较正畸前显著降低了3.94分(P<0.0001)。其中正畸后的覆盖、拥挤度和其他评分较前分别显著降低了1.72分(P<0.0001)、0.63分(P<0.05)和0.68分(P<0.05)。且正畸后SN-MP(P<0.05)和IMPA(P<0.01)的测量值较前均有显著改善。结论:DI指数可应用于替牙期错[牙合]畸形早期矫治的评价。早期矫治短期效果可在一定程度上改善错[牙合]畸形情况,覆盖改善较为明显,也可有效改善颌骨垂直向关系和下前牙长轴的倾斜程度。Objective:This retrospective study aimed to put discrepancy index(DI)into use to evaluate the early orthodontic treatment outcome of malocclusions in mixed dentition quantificationally.Methods:This clinical analysis was performed at the Department of Stomatology,Children’s Hospital affiliated to Zhejiang University School of Medicine.Thirty-two patients diagnosed as malocclusion in mixed dentition were included in this study,from March 2015 to May 2019.All their models,panoramic radiographs and cephalometric radiographs before and after the treatment were analyzed using DI.Results:The average DI after early orthodontic treatment was significantly lower than that before by 3.94 points(P<0.0001).Among them,the overjet scores,crowding scores and other scores after treatment were significantly reduced by 1.72 points(P<0.0001),0.63 points(P<0.05)and 0.68 points(P<0.05)respectively.Meanwhile SN-MP angles(P<0.05)and IMPA angles(P<0.01)have improved significantly after treatment.Conclusion:DI can be used to evaluate the early orthodontic treatment outcome of malocclusions in mixed dentition.From the short-term effect,early orthodontic treatment can improve the malocclusion to some extent,and the overjet is more obvious.It can also effectively improve the vertical relationship of the jaws and the inclination of the long axis of the lower incisors.

关 键 词：替牙期 不调指数 错[牙合]畸形 早期矫治 

分 类 号：R783.5[医药卫生—口腔医学]