Leonardo Mário Roberto, da Silva Lea Assed Bezerra, Nelson-Filho Paulo, da Silva Raquel Assed Bezerra, Lucisano Marília Pacífico
Department of Pediatric Clinic, Preventive and Community Dentistry, School of Dentistry of Ribeirão Preto, University of São Paulo, Ribeirão Preto, São Paulo, Brazil.
Pediatr Dent. 2009 Jul-Aug;31(4):320-2.
The purpose of this study was to evaluate ex vivo the accuracy an electronic apex locator during root canal length determination in primary molars.
One calibrated examiner determined the root canal length in 15 primary molars (total=34 root canals) with different stages of root resorption. Root canal length was measured both visually with the placement of a K-file 1 mm short of the apical foramen or the apical resorption bevel, and electronically using an electronic apex locator (Digital Signal Processing). Data were analyzed statistically using the intraclass correlation (ICC) test.
Comparing the actual and electronic root canal length measurements in the primary teeth showed a high correlation (ICC=0.95).
The Digital Signal Processing apex locator is useful and accurate for apex foramen location during root canal length measurement in primary molars.
本研究的目的是在体外评估电子根尖定位仪在乳牙根管长度测定中的准确性。
由一名经过校准的检查者测定15颗处于不同牙根吸收阶段的乳牙（共34个根管）的根管长度。通过将K锉放置在距根尖孔或根尖吸收斜面1mm处进行目视测量根管长度，并使用电子根尖定位仪（数字信号处理）进行电子测量。使用组内相关系数（ICC）检验对数据进行统计学分析。
比较乳牙实际和电子测量的根管长度显示出高度相关性（ICC = 0.95）。
数字信号处理根尖定位仪在乳牙根管长度测量中用于根尖孔定位是有用且准确的。
