Orosco Fernando A, da Silva Guilherme F, Weckwerth Paulo H, Lopes Maria Thereza M, Garcia Alan M R, Duarte Marco Antônio H, de Moraes Ivaldo G
Pro-Rectory of Research and Post Graduation, Universidade do Sagrado Coração, Bauru, Brazil.
Department of Operative Dentistry, Endodontics and Dental Materials, Bauru School of Dentistry, University of São Paulo, Bauru, Brazil.
Aust Endod J. 2018 Dec;44(3):251-254. doi: 10.1111/aej.12235. Epub 2017 Sep 20.
The aim of this study was to evaluate the impact of different file sizes on the accuracy of two electronic apex locators (EALs). Thirty extracted human single-rooted permanent mandibular incisors were used. A #10 K-file was inserted in the root canal until its end could be observed (using a light microscope) through the apical foramen. One millimetre was subtracted to establish working length (WL). Electronic readings were performed using MiniApex Locator or Root ZX II, from #10 K-file to #130 K-file. Statistical analysis was performed by two-way anova and Tukey test (P ≤ 0.05). From #60 to #130 K-file, observed differences were noted between the values obtained with both EALs and WL (P ≤ 0.05). The MiniApex Locator showed increased means when measurements were made with #50 to #70 and with #120 (P = 0.008) and #130 (P = 0.005) K-files. File sizes influenced the accuracy of EALs - the greater the instrumentation size, the higher mean differences compared to WL.
本研究的目的是评估不同锉的尺寸对两种电子根尖定位仪（EAL）准确性的影响。使用了30颗拔除的人类单根恒下颌切牙。将一根#10 K锉插入根管，直到通过根尖孔（使用光学显微镜）可以观察到其末端。减去1毫米以确定工作长度（WL）。使用MiniApex Locator或Root ZX II从#10 K锉到#130 K锉进行电子读数。采用双向方差分析和Tukey检验进行统计分析（P≤0.05）。从#60到#130 K锉，两种EAL获得的值与WL之间存在显著差异（P≤0.05）。当使用#50至#70以及#120（P = 0.008）和#130（P = 0.005）K锉进行测量时，MiniApex Locator显示出均值增加。锉的尺寸影响EAL的准确性——器械尺寸越大，与WL相比平均差异越高。
