A Comparative Evaluation of Canal Transportation and Centering Ability of Three Different Ni-Ti File Systems - An In Vitro CBCT Study

Panithini Db,Kalyan Satish R,Madhu Varma K,Madhavi K,Sita Rama Kumar M ,Girija S Sajjan

doi:10.13189/ojdom.2021.090102

Abstract

Successful root canal therapy depends on many factors. One of the most important steps in any root canal treatment is biomechanical preparation. Additionally, respecting the original shape of the canal is of the same importance. Otherwise, canal aberrations such as transportation will be created. Purpose: To evaluate the canal transportation and canal centering ability of ProTaper Next (PTN), TruNatomy (TN), and Neohybrid (NH) file systems using cone-beam computed tomography. Materials and methods: Thirty extracted single-rooted mandibular premolars were decoronated and divided into three experimental groups, with ten in each group. Group I - ProTaper Next (PTN), Group II - TruNatomy (TN), and Group III - Neohybrid (NH) file systems. Cone-beam computed tomographic pre-scan were taken, followed by biomechanical preparation with the respective file systems. Post CBCT scans were taken and compared with pre-scans for canal transportation and canal centering ability at the levels of 3, 6, and 9mm. The data obtained were statistically analyzed. Results: Using One way ANOVA and Post hoc analysis, canal transportation at the level of 6mm from the apex, group II and group III have shown statistical significance compared to group I, and no statistically significant differences were seen at the levels of 3mm and 9mm. There is no statistically significant difference in canal centering ability among the three groups at the levels of 3,6, and 9mm from the apex. Conclusion: Under the in vitro conditions of the study, ProTaper Next (PTN), Trunatomy (TN), and Neohybrid (NH) rotary systems have shown similar behavior concerning canal transportation and canal centering ability.

Highlights

The success of root canal treatment varies on effective cleaning and shaping of the root canal system without deviating from the original anatomy [1]
Canal Transportation is defined as removing the canal wall structure on the outer curve in the apical half of the canal because of the likelihood of the files to restore themselves to their original linear shape during canal preparation [3]
A statistically significant difference is seen in group II and group III (P < .05) when compared with group I, Whereas no significant difference is seen among group II and group III

Summary

Introduction

The success of root canal treatment varies on effective cleaning and shaping of the root canal system without deviating from the original anatomy [1]. Irrespective of the instrumentation technique, cleaning and shaping procedures invariably lead to dentin removal from the canal walls [2]. Canal Transportation is defined as removing the canal wall structure on the outer curve in the apical half of the canal because of the likelihood of the files to restore themselves to their original linear shape during canal preparation [3]. The shaping ability of a particular file system is evaluated by analyzing postoperative root canal conicity, taper, the flow of the prepared root canal, and maintenance of the original canal shape.

Methods

Results

Conclusion