Abstract: Objective: To discuss the clinical application of CBCT (cone-beam computer tomography) in embedded and impacted teeth diagnosis. Methods: 56 patients (with 37 supernumerary teeth and 41 impacted teeth) who had been examined by panoramic radiography  without accurate results were scanned by CBCT again and observed in three-dimensional reconstruction, sagittal, coronal, axial sections. Results: CBCT possessed the advantages in three dimensional location. There were statistic difference between CBCT and panoramic radiography examination (P<0.05). Conclusion: CBCT is intuitive and accurate positioning of impacted supernumerary teeth and embedded teeth, especially those located in the maxillary anterior region.

Key words: impacted teeth; , ambushed teeth; , cone-beam computer tomography（CBCT）

摘要： 目的：探讨CBCT 在埋伏阻生牙诊治中的应用。方法：对56例（37颗多生牙、41颗阻生牙）经全景片检查需进一步明确诊断的埋伏阻生牙，进行CBCT 扫描，通过三维重建、矢状位、冠状位及轴位断层进行分析。结果：与全景片比较，CBCT 能准确定位埋伏阻生牙的位置、生长方向、数量，准确率差异有统计学意义(P<0.05)。结论：CBCT 可以更直观、准确地对埋伏阻生牙定位，特别是在上颌前牙区的临床诊治更有应用价值。

关键词: 埋伏牙；  , 阻生牙；  , CBCT

CLC Number: 

• R782.13