摘要
目的:探讨螺旋CT在儿童上颌前部埋伏阻生牙中定位的准确性及临床应用价值。方法:在2004年6月—2009年12月间就诊的89例埋伏阻生牙患者中,选取对常规咬合片和全颌曲面断层片不能清楚定位的30例上颌骨埋伏牙患者行螺旋CT扫描。应用螺旋CT的图像处理功能作多层面重建(MPR)和表面遮盖技术(SSD),观察片中埋伏牙的数目、大小、形态、唇腭向位置、与周围组织的关系以及冠根形成的角度。通过手术暴露窗口,评估螺旋CT定位的准确性和临床应用价值。结果:上颌骨内埋伏阻生牙33颗,均能准确无误地显示出埋伏牙的方向、形态、数目、唇腭侧骨质厚度。结论:螺旋CT能精准定位儿童上颌前部埋伏阻生牙并为手术提供最佳路径,在临床工作中具有重要的指导作用。
PURPOSE： To discuss the accuracy of localization and clinical usefulness of spiral CT for anterior maxillary impacted teeth.METHODS： In 89 children with impacted teeth in our department during June 2004 and December 2009,Spiral CT was performed in 30 cases whose impacted teeth can＇t be localized clearly by conventional occlusal film and panoramic radiogragh.Multip-lanarreformation（MPR） and the surface shaded display（SSD） of the spiral CT were used to observe the number,size,shape,location,its relationship with adjacent tissue,angle between crown and root of the impacted teeth.The region of operation was exposed to evaluate the accuracy of localization and the value of clinical application of the Spiral CT.RESULTS： It was found that the number,size,shape,location,angle between crown and root o f all the 33 impacted teeth could be displayed accurately.CONCLUSIONS： Spiral CT enables us to make a quick and accurate diagnosis of teeth impaction in the maxilla and can provide the best path for operation,which is helpful for pretreatment evaluation of the impacted teeth in clinic.
出处
《上海口腔医学》
CAS
CSCD
2011年第4期438-441,共4页
Shanghai Journal of Stomatology
