拔除埋伏多生牙与锥形束CT检查的必要性

Necessity of Cone Beam Computed Tomography with the Embeding Excess Tooth's Extraction

目的:观察分析在曲面体层X线片上埋伏多生牙与上中恒切牙的实际位置关系,为临床制定埋伏多生牙的拔除手术方案提供参考。方法:观察300例正畸患者的曲面体层X线片,将正中埋伏多生牙与上中恒切牙的位置关系的影像分为两种类型:接触类和接触类,对接触类行CBCT检查,观察埋伏多生牙实际与上中恒切牙接触所占的比例。结果:300例正畸患者的曲面体层X线片中,17例接触类埋伏多生牙,CBCT显示3例无接触,14例重叠。结论:锥形束CT检查可以清楚地观察埋伏多生牙与上中恒切牙的位置关系,为临床拔除埋伏多生牙提供便捷的手术入路。

Objective： To investigent the actual relationship between the maxillary central incisor and the embeding excess tooth（EXT） on panoramic radiogra phs（PR） and cone beam computed tomography（CBCT）.Methods：A cross-sectional study design was used and PR of 300 patients were included in the present study. The relationship between the maxillary central incisor and EXT on PR was defined in tow types：untouched and touched.The touched with maxillary central incisor on PR were examined by CBCT.Results：The relationship between the maxillary central incisor and EXT on PR were touched with 17 patiets. CBCT showed that untouched typpe 3（17.6%） and touched type 14（82.4%）.Conclusions：The EXT whith belong to the touched type on PR should be examined by CBCT.