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首页> 外文期刊>Open Journal of Urology >A Comparison between 2D and 3D Images to Study Maxillary and Mandibular Widths: A Pilot Study
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A Comparison between 2D and 3D Images to Study Maxillary and Mandibular Widths: A Pilot Study

机译：2D和3D图像与研究上颌和下颌宽度的比较：试验研究

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摘要

The objective of this study is to compare the transverse dimensions of the jaws, obtained from traditional posteroanterior (PA) cephalometric radiographs, and with the similar respective measurements obtained by means of cone beam computed tomography (CBCT). Data of twelve subjects were selected from the clinical records of Orthodontic Department. All of the subjects had their permanent teeth in occlusion and had good quality regular (2D), and CBCT (3D) images as part of their initial records. Subjects were divided to a posterior cross-bite and non-cross bite groups. The ratio of the maxillary, to mandibular transverse widths was calculated for the sample. In subjects without dental cross-bites the average ratio of the maxillary, to mandibular jaw widths was 0.75 on the standard radiographs and 1.04 on the CBCT scans. In subjects with dental cross-bites the average ratio of these widths was 0.70 on the standard radiographs and 0.9 on the CBCT scans. The ratios of the maxillary, to mandibular widths differ when obtained from conventional cephalometric radiographs as compared to the respective ratios obtained from CBCT scans. Maxillary, to mandibular width ratio is in the order of 1:1 as determined by means of CBCT scans.
机译：本研究的目的是比较钳口的横向尺寸，该钳口从传统的后肛门（PA）头部测量射线照片中获得，并且通过锥形光束计算机断层扫描（CBCT）获得的类似各个测量。从正畸部门的临床记录中选择了12个受试者的数据。所有受试者都有堵塞的永久牙齿，并且具有良好的常规（2D）和CBCT（3D）图像，作为其初始记录的一部分。受试者分为后咬和非交叉咬合群。计算出颌骨的比例对样品计算下颌横向宽度。在没有牙科交叉咬伤的受试者中，上颌部的平均比率为下颌颚宽度为0.75，在标准射线照片上为1.04次CBCT扫描。在牙科交叉叮咬的受试者中，在标准射线照片上的平均比例为0.70，CBCT扫描上的0.9。与从CBCT扫描获得的各自的比率相比，上颌骨上的颌骨上的比率与颌骨宽度不同。颌骨宽度比率为1：1，通过CBCT扫描确定。

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