三维CT精确重建颅颌面部组织的形态学特征

背景：头影测量技术是正畸术前临床诊断与矫治计划设计的重要手段，精确的头影测量可为矫治改计提供可靠的依据。三维CT重建技术可重建出清晰、立体、真实的颅颌面解剖形态。目的：综述CT三维藿建后的头影测量在口腔正畸中的临床应用，并与传统的X射线头影测蹙对比。方法：由第一作者于2010-09进行检索，检索PubMed数据库（http：／／www．ncbihim．nih.gov／pubmed／）及CNKl 数据库（http：／／dlib3.cnki.net/KNS50／）1996-01／2010-09有关正畸头影测量的文献，英文以“three-dimensional cephalometry．cephalometric measurements”为检索词，中文以“三维测量，头影测量”为检索词，排除重复研究或内容较陈旧的文献。结果与结论：计算机初步检索文献共114篇，根据纳入、排除标准，最后选择中英文文献共27篇进一步分析。三维CT重建头影测量技术作为一种理想的头影测量方法，以其高效、准确、快捷的优点，已广泛应用于临床。软硬组织的三维立体重建与测量分析系统以其强大的优势，终将取代现有的二维头影测量分析系统。

Accurate three-dimensional CT reconstruction of craniofacial morphology features

BACKGROUND： Orthodontic cephalometric technique is an important means for clinical diagnosis and treatment plan design of oral and maxillofacial deformities. Accurate cephalometry can offer reliable evidence for the treatment. Three-dimensional CT reconstruction technology can rebuild a clear, three-dimensional, real craniofacial anatomy. OBJECTIVE： To ssummarize the clinical application of three-dimensional reconstructed CT cephalometry in dental orthodontics and to compare with traditional X-ray cephalometry. METHODS： A computer-based online retrieval of PubMed database （http：//www.ncbi.nlm.nih.gov/pubmed/） and CNKI database （http：lldlib3.cnki.netlKNS50/） from January 1996 to September 2010 was performed by the first author, using ＂three-dimensional cephalometry, cephalometric measurements＂ in English and in Chinese as the search key words. Studies regarding orthodontic cephalometric measurements were included, while duplicate or out-dated studies were excluded. RESULTS AND CONCLUSION： Totally 114 paper were screened out by computer, 27 documents of which were involved for analysis according to inclusion and exclusion criteria. Three-dimensional CT reconstruction technology as an ideal method of cephalometry, has been widely used in clinical practice due to the high efficiency, accuracy and fast speed. Three-dimensional reconstruction, measurement and analysis system of soft and hard tissues will eventually replace the existing two-dimensional cephalometric analysis system with its powerful advantages.