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Contemp Clin Dent. 2018 Sep;9(Suppl 2):S215-S220. doi: 10.4103/ccd.ccd_17_18.

Comparative Evaluation of Apical Transportation and Canal Centric Ability in Apical Region of Newer nickel-titanium File Systems Using cone-beam computed tomography on Extracted Molars: An In Vitro Study.

Author information

1
Department of Pedodontics and Preventive Dentistry and Daswani Dental College and Research Centre, Kota, Rajasthan, India.
2
Department of Pedodontics and Preventive Dentistry, Maulana Azad Institute of Dental Sciences, New Delhi, India.

Abstract

Background:

Objective in root canal preparation is to develop a shape that tapers from apical to coronal, maintaining the original canal shape. With advent of instruments manufactured from nickel-titanium (NiTi) alloys, there was a significant improvement of quality of root canal shaping, with predictable results and less iatrogenic damage.

Aim:

The aim of the study was to evaluate the canal centric ability and apical transportation in apical region of newer NiTi file system in root canal using cone-beam computed tomography (CBCT) on extracted molars.

Materials and Methods:

Root canal of thirty extracted human permanent teeth with mature root apices with 20°-40° of curvature were collected and divided into three groups after initial bio-mechanical preparation: Group 1: canal prepared using ProTaperNext (PTN) file system; Group 2: canal prepared using Mani silk system; and Group 3: canal prepared using V-taper file system. All samples were scanned before and after biomechanical preparation using CBCT. The data collected were evaluated using the Kruskal-Wallis analysis of variance test and Mann-Whitney U-test.

Results:

It was observed that in apical region Group I (PTN) showed significantly lower mean apical transportation and canal centric ability as compared to Group II (Mani Silk) and Group III (V-taper).

Conclusion:

It was concluded that PTN rotary system has no canal transportation and maintained centric ability in comparison to Mani and V-taper rotary file system in apical region of curved root canal.

KEYWORDS:

Apical transportation; centric ability; cone-beam computed tomography; nickel-titanium rotary files

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