Krishnan Iyer Satishkumar, Sreedharan Sheela
Department of Pedodontics and Preventive Dentistry, Government Dental College, Trivandrum, Kerala, India.
Contemp Clin Dent. 2012 Oct;3(4):416-20. doi: 10.4103/0976-237X.107430.
The purpose of this in vitro study was to compare the root canal length determination by Electronic apex locator (EAL) (Raypex 5) and conventional radiography, and then compare them with the actual measurements obtained by direct visualization.
This study was conducted at the Department of Pedodontics and Preventive Dentistry, Government Dental College, Thiruvananthapuram, Kerala, India.
One hundred single rooted primary teeth extracted due to extensive caries, trauma, serial extraction or unwillingness of the parent to save the teeth were selected. The teeth were numbered and root canal length was determined using the visual, electronic and the radiographic methods. The actual, electronic and the radiographic measurements were recorded.
Data were analyzed using Intraclass correlation test and linear regression analysis.
The accuracy of EAL and radiographic methods were 92% and 72%, respectively within + 0.5 mm. Both the electronic and conventional radiographic methods showed a high correlation and agreement (ICC intraclass correlation coefficient = 0.99 and 0.98 respectively) with the actual measurements.
EALs proved to be more accurate in determining the root canal length than the radiographic method.
本体外研究的目的是比较电子根尖定位仪（EAL）（Raypex 5）和传统放射照相法测定根管长度的情况，然后将它们与通过直接可视化获得的实际测量值进行比较。
本研究在印度喀拉拉邦特里凡得琅政府牙科学院儿童牙科学与预防牙科学系进行。
选取因广泛龋坏、外伤、序列拔牙或家长不愿保留牙齿而拔除的100颗单根乳牙。对牙齿进行编号，并使用视觉、电子和放射照相方法测定根管长度。记录实际、电子和放射照相测量值。
使用组内相关检验和线性回归分析对数据进行分析。
在±0.5毫米范围内，EAL和放射照相法的准确率分别为92%和72%。电子和传统放射照相方法与实际测量值均显示出高度相关性和一致性（组内相关系数ICC分别为0.99和0.98）。
事实证明，在确定根管长度方面，EAL比放射照相法更准确。
