Objective: To explore the value of 64-slice spiral CT in the diagnosis of impacted teeth. Methods: 97 patients,aged 6 to 27 years with an average of 13. 6 years, who had been diagnosed as having impacted teeth by X-ray ortho-pantomography underwent volume scan by 64-slice CT. The data of the 64-slice spiral CT scans were processed by GEAW 4. 3 workstations in different ways such as multi-planar reconstruction,curved planar reformation,maximum intensity projection, surface shaded display and volume rendering technique. Results:95 cases of impacted teeth, which were 97. 9% of the total 97 cases of patients, were diagnosed precisely and clearly by 64-slice spiral CT, while 23 cases of impacted teeth, which were 23. 7% of the total 97 cases of patients, were diagnosed precisely and clearly by X-ray orthopantomography. 97 cases of impacted teeth, which were 100% of the total 97 cases of patients, were located accuratly by 64-slice spiral CT, while 23 cases of impacted teeth,which were 23. 7% of the total 97 cases of patients, were located accurately by X-ray orthopantomography. Conclusion:64-slice spiral CT reconstruction techniques are helpful to the diagnosis of impacted teeth,particularly,to the accurate positioning of impacted teeth.%目的:探讨64层螺旋CT在埋伏牙影像学诊断的应用价值.方法:97例经曲面体层X片确诊为埋伏牙的患者行64层螺旋CT容积扫描,将扫描信息利用AW 4.3工作站对数据进行多平面重建、曲面重组、最大强度投影、表面遮盖显示、容积再现技术重组图像.结果:97例埋伏阻生牙患者中64层螺旋CT明确诊断且显示清晰95例,占总数97.9％,准确定位97例,占总数100％；曲面体层X片明确诊断且显示清晰23例,占总数23.7％,准确定位29例,占总数29.9％.结论:64层螺旋CT重建技术对于埋伏阻生牙的影像学诊断,特别是准确定位具有独特的指导意义.
展开▼
