多层螺旋CT在埋伏牙诊治中的应用
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Application of multislice computed tomography for diagnosis and treatment of impacted teeth
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    摘要:

    目的 探讨多层螺旋CT(MSCT)扫描后的多平面重建(MPR)、容积再现(VR)和最大密度投影(MIP)成像技术对埋伏牙的诊断和制定治疗方案的意义。 方法 在获取MSCT扫描数据的基础上建立MPR、VR、MIP图像,对10例通过X线检查证实有埋伏牙存在的病例进行定位检查。 结果 MPR可提供埋伏牙所处部位骨组织的相对密度,精确测量埋伏牙各个解剖位置与颊舌向骨壁或邻牙间的距离;VR图像可直观表达埋伏牙的立体位置及与邻牙的相对关系;MIP能显示埋伏阻生牙的解剖结构及其周围骨质密度。 结论 3种三维重建图像的联合应用可精确直观地表达埋伏阻生牙的位置及其与邻牙等相关组织结构的解剖关系,为手术治疗或正畸治疗提供可靠信息。

    Abstract:

    Objective To investigate the values of the multi-planar reformation(MPR), volume rendering(VR) and maximum intensity projection(MIP) following multislice computed tomography (MSCT) examination in the diagnosis and therapy of impacted tooth. Methods Ten patients confirmed with impacted tooth by X-ray film were scanned with MSCT and the data were sent to the workstation for reconstruction of the MPR, VR, and MIP. Results MPR was able to demonstrate the relative bone intensity around the implanted tooth and exactly determine the distance of impacted tooth with the buccolingual bone wall or adjacent teeth. VR directly displayed the three-dimensional position of the impacted tooth and its relationship with the adjacent teeth. MIP displayed the anatomic structure of the impacted tooth and the bone density around it. Conclusion Combination of MPR, VR, and MIP can directly and accurately demonstrate the location of the impacted tooth and its anatomic relation with the adjacent teeth, providing reliable information for surgical and orthodontic treatment.

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  • 收稿日期:2011-06-25
  • 最后修改日期:2011-09-07
  • 录用日期:2011-10-26
  • 在线发布日期: 2011-11-23
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