Rathore Khushboo, Tandon Sandeep, Sharma Meenakshi, Kalia Garima, Shekhawat Tejshree, Chundawat Yogendra
Department of Pediatric and Preventive Dentistry, Government Dental College, Jaipur, Rajasthan, India.
Int J Clin Pediatr Dent. 2020 May-Jun;13(3):235-239. doi: 10.5005/jp-journals-10005-1768.
Correct working length determination is one of the main factors leading to success in root canal treatment. The digital tactile sense technique and conventional radiography (CR) are common techniques for working length determination but both techniques have some limitations. A newer method of working length estimation involves use of the apex locator. The current study was carried out to compare the accuracy of the apex locator with a tactile and conventional radiographic method for working length determination in primary and permanent teeth.
The study was conducted on 60 children selected randomly from the outpatient department of the Department of Pediatric and Preventive Dentistry. The patients were divided into two groups: primary and permanent. An informed consent was obtained. After radiographic confirmation of the presence of more than two-third root length access, opening was done in all the teeth. The pulp was extirpated completely from the chamber and canals. Canals were dried completely using paper points. Working length was determined by all the three methods, i.e., digital tactile method, apex locator, and conventional intraoral periapical radiographic method in both primary and permanent teeth.
The data were coded and entered into the Microsoft Excel spreadsheet. The analysis was done using the SPSS version 20 (IBM SPSS Statistics Inc., Chicago, Illinois, USA) Windows software program. The variables were assessed for normality using the one-way ANOVA test. Within the limitations of this study, working lengths obtained by the tactile method, the apex locator, and the radiographic method were comparable. There was no statistically significant difference among the three methods except in mesiolingual and distobuccal canals of permanent teeth.
The apex locator can serve as a useful guide to determine the working length in permanent as well as primary teeth.
Rathore K, Tandon S, Sharma M, Comparison of Accuracy of Apex Locator with Tactile and Conventional Radiographic Method for Working Length Determination in Primary and Permanent Teeth. Int J Clin Pediatr Dent 2020;13(3):235-239.
确定正确的工作长度是根管治疗成功的主要因素之一。数字触觉技术和传统放射摄影（CR）是确定工作长度的常用技术，但这两种技术都有一些局限性。一种较新的工作长度估计方法涉及使用根尖定位仪。本研究旨在比较根尖定位仪与触觉和传统放射摄影方法在乳牙和恒牙工作长度确定中的准确性。
本研究对从儿童与预防牙科门诊随机选取的60名儿童进行。患者分为两组：乳牙组和恒牙组。获得了知情同意。在通过放射摄影确认根管入口超过牙根长度的三分之二后，对所有牙齿进行开髓。将牙髓从髓腔和根管中完全摘除。使用纸尖将根管彻底干燥。通过数字触觉法、根尖定位仪和传统口内根尖片摄影法这三种方法确定乳牙和恒牙的工作长度。
数据进行编码后录入Microsoft Excel电子表格。使用SPSS 20版（美国伊利诺伊州芝加哥市IBM SPSS Statistics公司）Windows软件程序进行分析。使用单因素方差分析检验评估变量的正态性。在本研究的局限性内，通过触觉法、根尖定位仪和放射摄影法获得的工作长度具有可比性。除恒牙的近中舌侧根管和远中颊侧根管外，三种方法之间无统计学显著差异。
根尖定位仪可作为确定恒牙和乳牙工作长度的有用指南。
Rathore K, Tandon S, Sharma M, 乳牙和恒牙工作长度确定中根尖定位仪与触觉和传统放射摄影方法准确性的比较。《国际临床儿科牙科学杂志》2020；13(3):235 - 239。
