Abstract：
This study aimed to compare the main root canal configurations of mandibular incisors (MI) in a Brazilian population using Vertucci and Ahmed et al. classifications. One hundred and sixty-five human permanent MI were scanned using a micro-CT. Two examiners classified the samples according to Vertucci and Ahmed et al. classification. Kappa coefficient was employed. The majority of MI had a single root canal (52.1%). Type III Vertucci and 1 MI1-2-1 Ahmed et al. was the most common 2-canal MI (20%). In the apical third, the presence of one, two and three canals was found in 81.8%, 15.2% and 3% respectively. In the cervical and middle thirds, one, two and three canals were found in 86%, 12.2% and 1.8% respectively. Ahmed et al. classification was able to classify the entire sample studied, whereas 11 teeth (6.66%) did not fit Vertucci\'s classification.
摘要：
这项研究旨在使用Vertucci和Ahmed等人比较巴西人群下颌切牙（MI）的主要根管构型。分类。使用微型CT扫描了一百六十五个人永久性MI。两名审查员根据Vertucci和Ahmed等人对样品进行分类。分类。采用Kappa系数。大多数MI具有单个根管（52.1％）。III型Vertucci和1MI1-2-1Ahmed等人。是最常见的2管MI（20％）。在顶端第三，一个人的存在，在81.8%中发现了两条和三条运河，分别为15.2%和3%。在子宫颈和中间三分之二，一,86%的人发现了两条和三条运河，分别为12.2%和1.8%。艾哈迈德等人。分类能够对所研究的整个样本进行分类，而11颗牙齿(6.66%)不符合Vertucci的分类。
