Department of Restorative Dentistry and Endodontics, University of Rome Tor Vergata, Rome, Italy.
J Endod. 2011 May;37(5):684-7. doi: 10.1016/j.joen.2011.02.011. Epub 2011 Mar 22.
The aim of this study was to determine in anterior teeth, bicuspids, and molars (1) the accuracy of 3 different electronic apex locators (EALs) in detecting the apical foramen and (2) the accuracy of digital radiography in determining the working length (WL), compared with visible control under a microscope.
By using radiovideography (RVG), we measured the lengths of 120 root canals with 3 different EALs (Endex, ProPex II, and Root ZX) and compared them with the actual lengths. The accuracy of EALs and RVG was related to each dental category. An endodontic training kit (Pro-Train) was used during experimental procedures.
Statistical analysis showed that the 3 EALs and RVG were less accurate in anterior teeth and molars than in bicuspids. The paired-sample t test showed no statistically significant difference between mesiodistal plane and buccolingual plane digital radiography in all groups.
The 3 EALs tested were more accurate in detecting the apical foramen in bicuspids than in both molars and anterior teeth. Radiographic measurements were not reliable for determining WL in all dental groups in both radiographic planes.
本研究旨在确定 3 种不同电子根尖定位仪（EAL）在探测根尖孔方面的准确性（1），以及与显微镜下可见对照相比，数字射线照相术在确定工作长度（WL）方面的准确性（2）。
通过使用放射视频摄影术（RVG），我们测量了 120 个根管的长度，使用了 3 种不同的 EAL（Endex、ProPex II 和 Root ZX），并将其与实际长度进行了比较。EAL 和 RVG 的准确性与每个牙齿类别有关。在实验过程中使用了牙髓训练套件（Pro-Train）。
统计分析表明，3 种 EAL 和 RVG 在切牙和磨牙中的准确性低于双尖牙。配对样本 t 检验显示，在所有组中，近远中平面和颊舌平面数字射线照相术之间没有统计学上的显著差异。
在所测试的 3 种 EAL 中，在探测双尖牙的根尖孔方面比在磨牙和切牙中更准确。在所有牙齿组中，在两个射线照相平面中，射线照相测量法在确定 WL 方面均不可靠。
