Kishore Abhinav, Gurtu Anuraag, Bansal Rashmi, Singhal Anurag, Mohan Sumit, Mehrotra Anmol
Department of Conservative and Endodontics, Institute of Dental Sciences, Bareilly, Uttar Pradesh, India.
J Conserv Dent. 2017 May-Jun;20(3):161-165. doi: 10.4103/JCD.JCD_110_16.
The aim of the present study was to compare the canal transportation and centering ability of three rotary nickel-titanium (NiTi) systems (Twisted Files [TF], HyFlex controlled memory [CM], and Wave One [WO]) in curved root canals using computed tomography (CT).
Sixty freshly extracted single-rooted teeth having curved root canals with at least 25-35 degrees of curvature were selected. The teeth were randomly divided into three experimental groups of twenty each. After preparation with TF, HyFlex CM, and WO, all teeth were scanned using CT to determine the root canal shape. Pre- and post-instrumentation images were obtained at three levels, 3 mm apical, 9 mm middle, and 15 mm coronal above the apical foramen were compared using CT software. Amount of transportation and centering ability were assessed. The three groups were statistically compared with analysis of variance and Tukey's honestly significant difference test.
Least apical transportation and higher centering ability were seen in HyFlex CM file system in all the three sections followed by TF. WO file system showed maximum transportation.
The canal preparation with HyFlex CM file system showed lesser transportation and better centering ability than TF, WO file system.
本研究旨在使用计算机断层扫描(CT)比较三种旋转镍钛(NiTi)系统(Twisted Files [TF]、HyFlex可控记忆[CM]和Wave One [WO])在弯曲根管中的根管偏移和就位能力。
选取60颗新鲜拔除的单根弯曲根管牙齿,根管弯曲度至少为25 - 35度。将牙齿随机分为三组,每组20颗。分别用TF、HyFlex CM和WO进行根管预备后,所有牙齿均采用CT扫描以确定根管形态。在根尖孔上方3mm根尖、9mm中部和15mm冠部三个水平获取根管预备前后的图像,使用CT软件进行比较。评估根管偏移量和就位能力。采用方差分析和Tukey真实显著性差异检验对三组进行统计学比较。
在所有三个节段中,HyFlex CM锉系统的根尖偏移量最小,就位能力较高,其次是TF。WO锉系统显示出最大的根管偏移。
与TF、WO锉系统相比,HyFlex CM锉系统进行根管预备时根管偏移较小,就位能力较好。