Shibin John, Gs Prathima, M Suganya, S Nandhakumar, Adimoulame Sanguida, M Kavitha
Department of Pedodontics, Indira Gandhi Institute of Dental Sciences, Sri Balaji Vidyapeeth (Deemed to be University), Puducherry, India.
Int J Clin Pediatr Dent. 2022;15(Suppl 1):S92-S96. doi: 10.5005/jp-journals-10005-2330.
In primary teeth, working length determination is complicated due to its continuous alteration in dimension, shape, and root apex position. Accurate working length determination is essential to achieve the optimal cleaning and disinfection of the canal. Despite the use of conventional radiographic method, newer methods are available to increase the accuracy of WL determination. This study aims to compare electronic apex locator (EAL) with radiographic method of WL determination and to evaluate its accuracy using cone-beam computed tomography (CBCT).
Sixty root canals from 34 extracted primary teeth were included. Occlusal surfaces were flattened and access opening done for all the samples. Teeth were subjected to working length determination by conventional radiograph and EAL. Samples were then mounted on a U-shaped wax and subjected to CBCT. Results were recorded and statistically analyzed using ANOVA and ICC for quantitative data.
The mean measurement of radiographic, EAL and CBCT methods are 11.708, 11.200, and 10.895, respectively. Mean measurements demonstrated significant difference ( < 0.05) between three methods. ICC demonstrated high correlation between EAL and CBCT with Cronbach's α value of 0.962 and moderate correlation were observed between radiographic method and CBCT (0.706) and EAL and radiographic method (0.763). EAL demonstrated 87% accuracy whereas radiographic method demonstrated 63% accuracy to the actual length as evaluated by CBCT.
EAL is more accurate than conventional radiographic method as evaluated by CBCT.
Shibin J, GS P, M S, Evaluation of the Working Length Determination Accuracy by Cone-beam Computed Tomography in Primary Teeth. Int J Clin Pediatr Dent 2022;15(S-1):S92-S96.
在乳牙中，由于其尺寸、形状和根尖位置不断变化，工作长度的确定较为复杂。准确确定工作长度对于实现根管的最佳清洁和消毒至关重要。尽管使用了传统的放射照相方法，但仍有更新的方法可提高工作长度确定的准确性。本研究旨在比较电子根尖定位仪（EAL）与放射照相法确定工作长度，并使用锥形束计算机断层扫描（CBCT）评估其准确性。
纳入34颗拔除乳牙的60个根管。将所有样本的咬合面平整并制备进入开口。通过传统X线片和EAL对牙齿进行工作长度测定。然后将样本固定在U形蜡上并进行CBCT检查。记录结果并使用方差分析和组内相关系数（ICC）对定量数据进行统计分析。
放射照相法、EAL和CBCT方法的平均测量值分别为11.708、11.200和10.895。三种方法的平均测量值显示出显著差异（P<0.05）。ICC显示EAL与CBCT之间具有高度相关性，Cronbach's α值为0.962，放射照相法与CBCT之间（0.706）以及EAL与放射照相法之间（0.763）观察到中度相关性。以CBCT评估，EAL的准确率为87%，而放射照相法的准确率为63%。
经CBCT评估，EAL比传统放射照相法更准确。
Shibin J, GS P, M S, 锥形束计算机断层扫描评估乳牙工作长度确定的准确性。《国际临床儿科牙科学杂志》2022；15（S-1）：S92-S96。
