[摘 要]目的 利用锥形束CT研究上颌窦底位置与上颌第一磨牙的关系，为临床治疗中磨牙的移动提供参考。方法 选取2022年1月-2024年1月在本院就诊的54例拟行正畸矫治的患者为研究对象，根据垂直骨面型分类将其分为均角型组、高角型组及低角型组，每组18例。应用锥形束CT测量各组上颌第一磨牙与上颌窦的距离，比较三组上颌第一磨牙根尖同上颌窦底间关系的分类情况、上颌第一磨牙至上颌窦底距离。结果 三组上颌第一磨牙根尖同上颌窦底间的关系分类数据比较，差异有统计学意义(P<0.05)；高角型组1+2+3类占比高于均角型组、低角型组，但差异无统计学意义(P>0.05)，均角型组、低角型组对比1+2+3类占比一致；高角型组第一磨牙近中颊根、远中颊根、腭根到上颌窦底的距离优于均角型组、低角型组(P<0.05)。结论 通过CBCT检查可以发现，高角型患者上颌窦底位置偏低，与上颌第一磨牙牙根邻近，且上颌第一磨牙牙根尖多与上颌窦底接触。

    [关键词] 上颌第一磨牙；上颌窦底；正畸移动；锥形束CT

    [中图分类号] R78 [文献标识码] A [文章编号] 1004-4949(2024)11-0059-04

    A Cone Beam CT Study on the Relationship Between the Position of the Maxillary Sinus Floor and the Maxillary First Molar

    CHEN Zhou-yan

    (Ya’an People’s Hospital， Ya’an 625000， Sichuan， China)

    [Abstract]Objective To study the relationship between the position of the maxillary sinus floor and the first maxillary molar using cone beam CT， and provide reference for the movement of molars in clinical treatment. Methods A total of 54 patients who underwent orthodontic treatment in our hospital from January 2022 to January 2024 were selected as the research objects. According to the classification of vertical bone surface type ......