Oral Imaging Center, OMFS-IMPATH research group, Department of Imaging & Pathology, Faculty of Medicine, University of Leuven, Leuven, Belgium; Department of Radiology, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand.
Orthod Craniofac Res. 2014 May;17(2):69-91. doi: 10.1111/ocr.12034. Epub 2013 Dec 22.
The scientific evidence of 3D cephalometry in orthodontics has not been well established.
The aim of this systematic review was to evaluate the evidence for the diagnostic efficacy of 3D cephalometry in orthdontics, focusing on measurement accuracy and reproducibility of landmark identification.
PubMed, EMBASE and the Cochrane library (from beginning to March 13, 2012) were searched. Search terms included: cone-beam computed tomography; tomography, spiral computed; imaging, three-dimensional; orthodontics.
Two reviewers read the retrieved articles and selected relevant publications based on pre-established inclusion criteria. The selected publications had to elucidate the hierarchical model of the efficacy of diagnostic imaging systems by Fryback and Thornbury.
The data was then extracted according to two protocols, which were based on the Quality Assessment of Diagnostic Accuracy Studies (QUADAS) tool. Next, levels of evidence were categorized into 3 groups: low, moderate and high evidence.
571 publications were found by database search strategies and 50 additional studies by hand search. A total of 35 publications were included in this review.
Limited evidence for the diagnostic efficacy of 3D cephalometry was found. Only 6 studies met the criteria for a moderate level of evidence. Accordingly, this systematic review reveals that there is still need for methodologically standardized studies on 3D cephalometric analysis.
3D 头影测量在正畸学中的科学证据尚未得到充分确立。
本系统评价旨在评估 3D 头影测量在正畸学中的诊断效能证据，重点关注标志点识别的测量准确性和可重复性。
PubMed、EMBASE 和 Cochrane 图书馆（从 2012 年 3 月 13 日开始）进行了检索。搜索词包括：锥形束 CT；螺旋 CT 体层摄影术；三维成像；正畸学。
两位评审员阅读检索到的文章，并根据预先确定的纳入标准选择相关出版物。所选出版物必须阐明 Fryback 和 Thornbury 的诊断成像系统效能的层次模型。
然后根据两个方案提取数据，该方案基于诊断准确性研究的质量评估（QUADAS）工具。接下来，将证据水平分为 3 组：低、中、高证据。
通过数据库搜索策略发现了 571 篇出版物，通过手工搜索发现了另外 50 篇研究。共有 35 篇出版物被纳入本综述。
仅发现了有限的 3D 头影测量诊断效能的证据。仅有 6 项研究符合中等水平证据的标准。因此，本系统评价表明，3D 头影分析仍需要进行方法标准化研究。
