Department of Orthodontics, Faculty of Medicine and Dentistry, University of Valencia, Valencia, Spain.
Angle Orthod. 2011 Sep;81(5):856-64. doi: 10.2319/121210-717.1. Epub 2011 Apr 7.
OBJECTIVE: To assess whether the values of different measurements taken on three-dimensional (3D) reconstructions from cone-beam computed tomography (CBCT) are comparable with those taken on two-dimensional (2D) images from conventional lateral cephalometric radiographs (LCRs) and to examine if there are differences between the different types of CBCT software when taking those measurements. MATERIAL AND METHODS: Eight patients were selected who had both an LRC and a CBCT. The 3D reconstructions of each patient in the CBCT were evaluated using two different software packages, NemoCeph 3D and InVivo5. An observer took 10 angular and 3 linear measurements on each of the three types of record on two different occasions. RESULTS: Intraobserver reliability was high except for the mandibular plane and facial cone (from the LCR), the Na-Ans distance (using NemoCeph 3D), and facial cone and the Ans-Me distance (using InVivo5). No statistically significant differences were found for the angular and linear measurements between the LCRs and the CBCTs for any measurement, and the correlation levels were high for all measurements. CONCLUSION: No statistically significant differences were found between the angular and linear measurements taken with the LCR and those taken with the CBCT. Neither were there any statistically significant differences between the angular or linear measurements using the two CBCT software packages.
目的:评估从锥形束计算机断层扫描(CBCT)的三维(3D)重建中获取的不同测量值与从传统侧位头颅侧位片(LCR)获取的二维(2D)图像的测量值是否可比,并检查在获取这些测量值时,不同类型的 CBCT 软件之间是否存在差异。
材料和方法:选择了 8 名同时接受 LCR 和 CBCT 的患者。使用两种不同的软件包(NemoCeph 3D 和 InVivo5)对每位患者的 CBCT 3D 重建进行评估。一位观察者在两次不同的时间,在三种记录类型上的每一种记录上进行了 10 个角度和 3 个线性测量。
结果:除了下颌平面和面部锥体(来自 LCR)、Na-Ans 距离(使用 NemoCeph 3D)以及面部锥体和 Ans-Me 距离(使用 InVivo5)外,观察者的内部可靠性都很高。对于任何测量,LCR 和 CBCT 之间的角度和线性测量均未发现统计学差异,并且所有测量的相关性水平都很高。
结论:LCR 和 CBCT 之间的角度和线性测量值之间没有发现统计学差异。在使用两种 CBCT 软件包进行的角度或线性测量之间也没有发现统计学差异。
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