An in vitro evaluation of the accuracy of Dentaport ZX apex locator in enlarged root canals
An in vitro evaluation of the accuracy of Dentaport ZX apex locator in enlarged root canals
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DOI：
10.1111/j.1834-7819.2007.tb00488.x
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发表时间：
2007-09-01
影响因子：
2.1
通讯作者：
Suda, H.
中科院分区：
文献类型：
--
作者：
Ebrahim, A. K.;Wadachi, R.;Suda, H.
背景：这项研究的目的是检查根管冲洗剂对Dentaport ZX(TM)(R)电子根尖定位器(EAL)在扩大根管中的准确性的影响。我们先前的研究表明，随着根管直径的增加，在有血液存在的情况下，电子测量的小尺寸锉的长度会变短。目前尚不清楚不同的根管冲洗剂是否会影响EAL在扩大根管中的读数准确性。在第一阶段，使用#10-40K-锉和#40K-锉作为根尖主钻(MAF)进行根管预备。将牙齿随机分成五组，安装在实验装置中。A组：0.5%NaOCl；B组：2.5%NaOCl；C组：15%EDTA；D组：0.8%洗必泰(CHX)；E组：RC Prep。在阶段2中，使用#60 K钉作为MAE来扩大根管；在阶段1和阶段2中，根管的根尖部分采用逐步后退序列(直到#80 K钉)。在阶段3，再次扩大根管，在每个阶段使用#80 K钉作为MAE，使用Dentaport ZX(TM)(R)分别使用#10和#40，#10和#60，#10和#80 K钉分别测量第1、2和3期的根管长度。采用双因素方差分析和Fisher‘s最小二乘检验进行统计学处理。
Background: The aim of this study was to examine the effects of root canal irrigants on the accuracy of Dentaport ZX (TM)(R) electronic apex locator (EAL) in enlarged root canals. Our previous study revealed that as the diameter of the root canal increased, the electronically measured length with small size files became shorter in the presence of blood. It is not known whether different canal irrigants would interfere with the reading accuracy of an EAL in enlarged root canals.Methods: A total of 45 extracted single-rooted human teeth were used. In Stage 1, canals were instrumented using #10-40 K-files with a #40 K-file as the master apical file (MAF). The teeth were randomly divided into five groups and mounted in an experimental apparatus. The following irrigants were used during electronic canal measurements: Group A 0.5% NaOCl; Group B = 2.5% NaOCl; Group C 15% EDTA; Group D = 0.8% chlorhexidine (CHX); and Group E = RC Prep. In Stage 2, the canals were enlarged using a #60 K-file as the MAE In Stages 1 and 2, the apical portion of the canals was instrumented using the step-back sequence (up to a #80 K-file). In Stage 3, the canals were enlarged again using a #80 K-file as the MAE In each stage, the canal length was measured with a Dentaport ZX (TM)(R) using #10 and #40, #10 and #60, and #10 and #80 K-files for Stages 1, 2 and 3, respectively. Data were analysed by two-way ANOVA and Fisher's PLSD test.Results: Statistical analysis showed significant differences among all groups (p