论文部分内容阅读
目的探讨多排螺旋CT重组技术在多生牙诊断中的应用。方法 12例疑为多生牙的儿童进行多排螺旋CT容积扫描,年龄8～11岁,平均9.5岁。应用多层螺旋CT的图像后处理技术行多层面重建(multiplanar refomationg,MPR)、三维重建(3-dimensional reconstruction,3D)、曲面重建(curved planar reformat,CPR)、表面遮盖显示法(shaded surface displap,SSD)、容积再现技术(Volume Rendering Technique,VRT),获得多生牙的任意方向的三维立体图像或任意曲面的影像。结果 12例均为上颌多生牙,其中7例为1枚多生牙5,例2枚;12例均发生于混合牙列期;发生于上颌两门齿正中2例,上颌左第一门齿后5例,上颌右第一门齿后2例,上颌右第一门齿处2例,上颌左第一门齿前1例;多排CT后处理技术可全方位立体的展现多生牙的数目、形态、位置、大小、方向、与颌骨及邻近牙齿的关系。结论 64排螺旋CT后处理技术能够精确定位儿童多生牙,对于儿童多生牙的诊断及临床治疗具有指导意义。
Objective To investigate the application of multi-slice spiral CT in the diagnosis of multiple adolescent teeth. Methods Twelve children suspected of having multiple teeth were scanned by multi-slice spiral CT, aged from 8 to 11 years old with an average of 9.5 years. Multiplanar reconstruction (MPR), 3-dimensional reconstruction (3D), curved planar reformat (CPR), shaded surface displap , SSD) and Volume Rendering Technique (VRT) to obtain three-dimensional stereoscopic images or images of arbitrary curved surfaces in multiple directions. Results All the 12 cases were maxillary and multiple primary teeth. Among them, 7 cases were one with multiple adn teeth 5 and 2 cases. Twelve cases occurred in mixed dentition. Two cases occurred in the middle of two maxillary teeth, two in the middle of the maxillary left first incisor 5 cases, 2 cases of maxillary first incisors, 2 cases of maxillary first incisors and 1 case of maxillary left first incisors. Multi-slice CT post-processing technique can comprehensively display the number and morphology of multiple teeth, Location, size, orientation, relationship with the jaw and adjacent teeth. Conclusion The 64-slice spiral CT postprocessing technique can accurately locate adulthood teeth in children, which has guiding significance for the diagnosis and clinical treatment of adolescent teeth.