锥形束CT对牙齿种植位点线距测量精度的实验研究  

Precision linear measurement using cone beam CT in dental implants： an experimental study

作　　者：李旻[1] 张志宏[1] 刘红红[1] 付晓江 张震东[1] 

机构地区：[1]安徽医科大学附属省立医院口腔医学中心,合肥230001 [2]合肥拜尔口腔口腔种植科

出　　处：《中华放射学杂志》2016年第1期52-56,共5页Chinese Journal of Radiology

基　　金：安徽省2013-2014科技攻关计划项目（1301041026）

摘　　要：目的研究锥形束CT（CBCT）对牙齿种植位点线距测量的精确性与可靠性，为CBCT在种植外科的临床应用提供理论参考。方法选取10具不同的无牙牙合下颌骨模型进行研究，模型中混入10％的硫酸钡。所有下颌骨模型均用牙胶尖标记，确定测量截面及测量线距，拍摄CBCT并应用设备自带的DCTViewer软件测量标记线距，并与游标卡尺直接测量的线距长度相对比。对CBcT测量值与体外直接测量值进行配对样本t检验，P〈0．05为差异有统计学意义。结果cBcT测量前牙垂直线距、后牙垂直线距、前牙水平线距、后牙水平线距与游标卡尺测量的相应结果之间差值分别为（-0．0895±0．2200）、（-0．0830±0．1900）、（-0．0520±0．1400）、（-0．0847±0．3200）mm，CBCT测量结果与游标卡尺直接测量结果之间差异无统计学（t值分别为-1．784、-1．981、-1．621、-1．684，P值均〉0．05）。结论在牙齿种植位点线距测量方面，CBCT有较高的准确性与可靠性。Objective The aim of this study was to investigate the accuracy and reliability of linear measurements using cone beam computed tomography（CBCT） system and to provide theoretical application of CBCT in oral implantation. Methods Ten experimental models of different toothless mandibles mixed with 10% of barium sulfate were used in this study. All these mandible models were marked with gutta-percha markers to standardize the plane of the transverse cross-sections and path of measurements. The mandible models were imaged using Mayer SS-X9010D CBCT device. Measurements were taken with DCT Viewer software and compared with measurements recorded directly in the mandible models using vernier caliper. A paired sample t-test was performed to compare difference between CBCT measurement and vernier caliper measurement. Less than 0.05 were considered statistically significant. Results The differences of vertical lines between CBCT and vernier caliper were （-0.089 5±0.220 0） mm in anterior teeth area and （-0.083 0±0.190 0） mm in posterior teeth area. The differences of vertical lines between CBCT and vernier caliper were （-0.052 0±0.140 0） mm in anterior teeth area and （-0.084 7±0.320 0） mm in posterior teeth area. The corresponding t values were-1.784,-1.981,-1.621 and-1.684, respectively. All the P values were greater than 0.05. There was no significant difference between CBCT measurement and vernier caliper measurement. Conclusions CBCT is auseful tool to provide good accuracy and precision of linear t in dental implants.

关 键 词：体层摄影术 X线计算机 牙种植 诊断 口腔 

分 类 号：R816.98[医药卫生—放射医学] R783.6[医药卫生—临床医学]