基于CBCT技术对与上颌窦底毗邻第一磨牙正畸移动的研究  

The Use of CBCT on the Study of the Movement of the Maxillary Teeth Penetrated to the Maxillary Sinus Floor

作　　者：哈丽哈·赛力克别克 金苗 米丛波[1] Ha li ha·SAILIKEBIEKE;JIN Miao;MI Cong-bo(Department of Orthodontics,the First Affiliated Hospital of Xinjiang Medical University,Urumqi 830011,Xinjiang,China)

机构地区：[1]新疆医科大学第一附属医院口腔正畸科

出　　处：《中国美容医学》2020年第1期72-74,共3页Chinese Journal of Aesthetic Medicine

基　　金：新疆维吾尔自治区科技厅资助项目(编号:2016D01C247)

摘　　要：目的:通过锥形束CT(Cone beam computed tomography,CBCT)技术探究与上颌窦底毗邻的第一磨牙受矫治力后的移动方式。方法:从笔者医院口腔正畸科留存的CBCT资料中,筛选22例上颌第一磨牙牙根与上颌窦底壁相接触,或者突入上颌窦内的影像资料,利用CBCT配套的软件进行三维重建测量。CBCT资料中通过定位左、右眶点、右耳点,构建平面A(Axial)。过左、右眶点,构建垂直于A的平面为C(Coronal)。标记第一磨牙各个牙根尖点和牙冠近中边缘嵴中点,分别测量矫治前后以上标记点与C平面的距离。结果:上颌第一磨牙近、远中颊根、腭根与上颌窦窦底相接触的比率分别是:88.23%、89.21%和96.97%。通过对比矫治前后相关数据,得出第一磨牙各个牙根尖点,牙冠近中边缘嵴中点与C平面的距离有明显差异(P<0.05),具有统计学意义。结论:上颌第一磨牙的腭根与上颌窦底的关系最为密切,相比而言,腭根突入上颌窦内几率最高。矫治结束后,与上颌窦底接触的第一磨牙在适宜的正畸力作用下发生了近中移动。Objective The purpose of this study were to dissect the movement of the maxillary teeth,these teeth were penetrated to the maxillary sinus floor.Methods Selected 22 patients pre-and post-treatment CBCT data,which were with teeth penetrated to the maxillary sinus floor.Assume the plane as plane A,which through the right porion and two orbitale points,the plane C was perpendicular to the A plane and go through the two orbitale points.Measure the distance between every root tips and the middle of the mesiomarginal ridge of the upper first molar to the C plane.All the teeth take into account were with root penetrating to the sinus floor.Results We got that the percentage of the mesio buccle root,distal buccal root and the palatine root of the upper first molar penetrating to the sinus floor were 88.23%,89.21% and 96.97%.Comparing the records which are the distance between every root tips and the middle of the mesiomarginal ridge of the upper first molar to the C plane pre-and post-treatment,We find that there had significant differences(P<0.05).Conclusion The palatine root was the most closely related with the maxillary sinus floor compared with the other roots of upper first molar.During and after treatment the position of every teeth root tips and the dental crown of the first molar were significantly moved.

关 键 词：CBCT 上颌窦底 牙齿移动 突入 正畸力 

分 类 号：R783.9[医药卫生—口腔医学]