Abstract: Cone beam computed tomography（CBCT）which permits to execute three-dimensional reconstructions on axial，sagittal and coronal planes can accurately demonstrate the diagnosis information of the ambushed or impacted teeth，including the shape，location，amount，orientation and the relationship with adjacent structures.   

Key words: ambushed tooth, impacted tooth, cone beam CT

摘要： 口腔颌面锥形束CT可以提供矢状位、冠状位、水平位三个轴面的诊断信息，并且可以通过三维重建直观地显示立体图像，从而能够精确地确定埋伏阻生牙的形状、位置、数目、阻生方向及其与邻近结构的关系。 

关键词: 埋伏牙, 阻生牙, 锥形束CT