Wankhade Abhijit Devidas, Kumar Rakesh, Singh Rajeev Kumar, Chandra Anil
Department of Pedodontics, Vidharbh Youth Welfare Society's Dental College and Hospital, Amravati, Maharastra, India.
Pediatr Dent. 2013 Mar-Apr;35(2):E38-42.
To evaluate and compare the accuracy of root canal lengths (RCLs) in primary teeth using different clinical methods.
RCLs of 70 extracted human primary single-rooted teeth were estimated in vivo by a calibrated investigator using the electronic apex locator (EAL) method, radiovisiography (RVG), conventional radiography (X-ray), and tactile sensation method (TSM). The teeth were categorized into Group 1 (G1; teeth without physiological root resorption [PRR]); Group 2 (G2; teeth with one-fourth apical PRR); and Group 3 (G3; teeth with one-fourth to three-fourths lingual PRR). RCLs determined by various in vivo methods were compared with the ex vivo actual root canal length method (ARCL), as determined by stereo-microscope. Data obtained were compared using analysis of variance, Newman-Keuls test, and Student's test.
In Groups 1 and 2, the mean RCL determined by EAL was closest to that of the gold standard ARCL, followed by RVG, X-ray, and TSM. In G3, the mean RCL determined by EAL was closest to ARCL, followed by TSM, RVG, and X-ray.
A fifth-generation electronic apex locator was found to be useful in accurately determining root canal lengths of primary teeth with or without physiological root resorption.
评估并比较使用不同临床方法测量乳牙根管长度（RCL）的准确性。
由一名经过校准的研究人员采用电子根尖定位仪（EAL）法、数字化X线成像（RVG）、传统X线摄影（X线）和触觉感知法（TSM），在体内估计70颗拔除的人类单根乳牙的RCL。这些牙齿被分为第1组（G1；无生理性牙根吸收[PRR]的牙齿）；第2组（G2；有四分之一根尖PRR的牙齿）；以及第3组（G3；有四分之一至四分之三舌侧PRR的牙齿）。将通过各种体内方法确定的RCL与通过立体显微镜确定的体外实际根管长度法（ARCL）进行比较。使用方差分析、纽曼-基尔斯检验和学生检验对获得的数据进行比较。
在第1组和第2组中，EAL确定的平均RCL最接近金标准ARCL，其次是RVG、X线和TSM。在G3组中，EAL确定的平均RCL最接近ARCL，其次是TSM、RVG和X线。
发现第五代电子根尖定位仪有助于准确确定有无生理性牙根吸收的乳牙的根管长度。
