口腔疾病防治2016，Vol.24Issue(5)：288-292,5.DOI:10.12016/j.issn.2096-1456.2016.05.006
上颌中切牙阻生对颅面结构的影响及其矫治
Influence of impacted maxillary central incisor on craniofacial structure and its orthodontic treatment
摘要
Abstract
Objective To explore the influence of impacted maxillary central incisor on craniofacial structure and its orthodontic treatment. Methods A total of 63 subjects with impacted upper central incisors were selected and catego-rized into the mixed ( n=32) and permanent dentition group ( n=31) . By using the lateral cephalograms of each subject, 15 angular and 6 linear measurements were made. The cephalometric data were analyzed and compared to data of its cor-responding control group with normal occlusion. Results Among the etiological factors of all 63 cases with impacted up-per incisors, supernumerary teeth, dentigerous cyst or odontoma, mechanical trauma and idiopathic factors comprise of 6. 3%, 6. 3%, 12. 4% and 73% respectively. Cephalometric analysis demonstrated a more retruded position of"A" point with decreased SNA and ANB angle in incisor impaction group. Dental compensations followed the decreased ANB angle with more proclined upper incisor and more upright lower incisor. In early stage of root development ( stage 7 and 8 of Nolla's method) , 12 out of 13 incisors were tracted successfully, whereas in late stage( stage 9 and 10) , 7 out of 15 inci-sors were extracted. Conlusions Upper central incisor impaction adversely influences maxillary development. Early or-thodontic treatment can improve successful rate and gain a better root morphology.关键词
阻生牙/中切牙/正畸/头影测量/牙龄Key words
Impacted tooth/Central incisor/Orthodontics/Cephalometry/Dental age分类
医药卫生引用本文复制引用
雷浪,柯晓菁,李厚轩,李煌,闫福华..上颌中切牙阻生对颅面结构的影响及其矫治[J].口腔疾病防治,2016,24(5):288-292,5.基金项目
国家自然科学基金青年项目(81400516) （81400516）
江苏省临床医学科技专项(BL2013002) （BL2013002）
