上颌尖牙阻生及相邻切牙牙根吸收的三维空间研究

发布时间：2019-07-02 14:18

【摘要】：目的:用锥形束CT(CBCT)在三维空间中定位阻生尖牙及确定最常见阻生类型,同时评估相邻切牙(中切牙和侧切牙)牙根吸收情况。方法:对63例患者92颗上颌阻生尖牙患者进行CBCT扫描,采用多平面重建(MPR)获得三维重建图像。在矢状、冠状、轴切面视图中,设定X,Y,Z平面,并对每个阻生尖牙牙尖定位,观察相邻切牙牙根吸收状况。结果:在X平面中:92%偏近中阻生,阻生距离10.4~15.1 mm,8%偏远中阻生,阻生距离2~5 mm;在Z平面中:60%偏腭侧阻生,阻生距离1~4 mm,40%偏唇侧阻生,阻生距离0~4 mm。相邻切牙牙根41.3%无吸收,36.5%轻微吸收,14.3%中度吸收,7.9%重度吸收。结论:上颌阻生尖牙最常发生于腭侧、近中,多伴有相邻切牙牙根吸收。
[Abstract]:Objective: to locate impacted fangs in three-dimensional space with conical beam CT (CBCT) and to determine the most common types of impacted teeth, and to evaluate the root resorption of adjacent incisors (middle incisors and lateral incisors). Methods: 92 maxillary impacted fangs from 63 patients were scanned by CBCT. Three-dimensional reconstruction images were obtained by multi-plane reconstruction (MPR). In the sagittal, coronal and axial view, set the X, Y, Z plane, and locate each impacted cusp to observe the root resorption of adjacent incisors. Results: in the X plane, 92% of the patients were impacted near the middle, the impacted distance was 10.4 鈮，

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